<SUBMISSION>
<ACCESSION-NUMBER>0000950137-06-006052
<TYPE>S-8
<PUBLIC-DOCUMENT-COUNT>3
<FILING-DATE>20060517
<DATE-OF-FILING-DATE-CHANGE>20060517
<EFFECTIVENESS-DATE>20060517
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>CDW CORP
<CIK>0000899171
<ASSIGNED-SIC>5961
<IRS-NUMBER>363310735
<STATE-OF-INCORPORATION>IL
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>S-8
<ACT>33
<FILE-NUMBER>333-134204
<FILM-NUMBER>06848834
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>200 N MILWAUKEE AVE
<CITY>VERNON HILLS
<STATE>IL
<ZIP>60061
<PHONE>8474656000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>200 N MILWAUKEE AVE
<CITY>VERNON HILLS
<STATE>IL
<ZIP>60061
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>CDW COMPUTER CENTERS INC
<DATE-CHANGED>19930322
</FORMER-COMPANY>
</FILER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>c05485sv8.htm
<DESCRIPTION>REGISTRATION STATEMENT
<TEXT>
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<TITLE>sv8</TITLE>
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<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="center" style="font-size: 10pt; margin-top: 18pt">As filed with the Securities and Exchange Commission on May&nbsp;17, 2006
</DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Registration No.&nbsp;333-
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT UNDER THE<BR>
SECURITIES ACT OF 1933</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>CDW Corporation</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of registrant as specified in its charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
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<TR valign="bottom">
    <TD align="center" valign="top"><B>Illinois</B><BR>
(State or other jurisdiction of<BR>
incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>36-3310735</B><BR>
(I.R.S. Employer Identification No.)</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><B>200 N. Milwaukee Ave.<BR>
Vernon Hills, Illinois</B><BR>
(Address of Principal Executive Offices)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>60061</B><BR>
(Zip Code)</TD>
</TR>
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</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>CDW 2006 Stock Incentive Plan<BR>
CDW Corporation Employee Stock Purchase Plan</B><BR>
(Full title of the plans)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Christine A. Leahy</B><BR>
Vice President, General Counsel and Corporate Secretary<BR>
CDW Corporation<BR>
200 N. Milwaukee Ave.<BR>
Vernon Hills, Illinois 60061<BR>
(847)&nbsp;465-6000<BR>
(Name, address and telephone number,<BR>
including area code, of agent for service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 0pt"><B>CALCULATION OF REGISTRATION FEE</B></DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="1%"></TD>
    <TD width="38%"></TD>
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    <TD width="2%"></TD>
    <TD width="34%"></TD>
    <TD width="2%"></TD><!-- VRule -->
    <TD width="2%"></TD>
    <TD width="4%"></TD>
    <TD width="2%"></TD><!-- VRule -->
    <TD width="2%"></TD>
    <TD width="3%"></TD>
    <TD width="2%"></TD><!-- VRule -->
    <TD width="2%"></TD>
    <TD width="3%"></TD>

    <TD width="1%"></TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount of</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Title of Securities</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount to be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Offering Price Per</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Aggregate Offering</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registration</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">to be Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Share</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Price</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Fee</TD>
    <TD width="1%">&nbsp;</TD>
</TR>

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    <TD width="1%" style="border-top: 1px solid #000000">&nbsp;</TD>
                    <TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">Common Stock, $.01
par value
</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 1px solid #000000">5,160,000 shares (1)(2)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 1px solid #000000">$56.01 (3)
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 1px solid #000000">$289,011,600
</TD>
    <TD style="border-right: 2px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 1px solid #000000">$30,924.24</TD>
    <TD width="1%" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

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</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Includes 4,660,000 shares issuable pursuant to the CDW 2006 Stock Incentive Plan and 500,000
shares issuable pursuant to an amendment to the CDW Corporation Employee Stock Purchase Plan.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>This registration statement also covers such additional and indeterminate number of shares as
may become issuable because of the provisions of the CDW 2006 Stock Incentive Plan or the CDW
Corporation Employee
Stock Purchase Plan relating to adjustments for changes resulting from a stock dividend, stock
split or similar change.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left">(3)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Estimated solely for the purpose of calculating the registration fee. Pursuant to Rule
457(h) under the Securities Act of 1933, the offering price is based upon the average of the
high and low prices reported for the Common Stock on the Nasdaq
National Market on May&nbsp;16, 2006.</TD>
</TR>

</TABLE>
</DIV>

<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">



</TABLE>
</DIV>
<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II<BR>
INFORMATION REQUIRED IN THE<BR>
REGISTRATION STATEMENT</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3. Incorporation of Documents by Reference</B>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following documents heretofore filed with the Securities and Exchange Commission (the
&#147;Commission&#148;) by CDW Corporation, an Illinois corporation (the &#147;Company&#148;), are incorporated herein
by reference:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Company&#146;s Annual Report on Form 10-K for the fiscal year ended December&nbsp;31,
2005;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(b)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Company&#146;s Quarterly Report on Form 10-Q for the fiscal quarter ended March
31, 2006;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(c)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Company&#146;s Current Report on Form 8-K filed on January&nbsp;31, 2006;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(d)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Company&#146;s Current Report on Form 8-K filed on April&nbsp;7, 2006; and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(e)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The description of the common stock, $.01 par value, of the Company (the &#147;Common
Stock&#148;) contained in the Company&#146;s registration statement on Form S-3/A filed under the
Securities Act of 1933, as amended (the &#147;Securities Act&#148;), on March&nbsp;18, 2004, including
any amendments or reports filed for the purpose of updating such description.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents filed by the Company with the Commission pursuant to Sections&nbsp;13(a), 13(c), 14
and 15(d) of the Securities Exchange Act of 1934, as amended (&#147;Exchange Act&#148;), after the date of
this registration statement and prior to the filing of a post-effective amendment to this
registration statement which indicates that all securities offered hereby have been sold or which
deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference
into this registration statement and to be a part hereof from the respective dates of filing of
such documents (such documents, and the documents listed above, being hereinafter referred to as
&#147;Incorporated Documents&#148;).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Any statement contained in an Incorporated Document shall be deemed to be modified or
superseded for purposes of this registration statement to the extent that a statement contained
herein or in any other subsequently-filed Incorporated Document modifies or supersedes such
statement. Any such statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this registration statement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;4. Description of Securities</B>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;5. Interests of Named Experts and Counsel</B>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;6. Indemnification of Directors and Officers</B>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;8.75 of the Illinois Business Corporation Act, among other things, permits
corporations to indemnify directors, officers, employees and agents against any expense, liability
or loss to which they may become subject, or which they may incur as a result of being or having
been a director, officer, employee or agent of the corporation. In reliance on this statutory
provision, our Restated Articles of Incorporation and Amended and Restated By-Laws provide that we
are required to indemnify our directors, officers, employees and agents to the maximum extent
permitted by law. We also maintain directors&#146; and officers&#146; liability insurance, which covers
liabilities under the federal securities laws.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The indemnification provisions applicable to the directors of the Company are set out in
Articles Sixth and Seventh of the Restated Articles of Incorporation and Article&nbsp;VI of the Amended
and Restated By-Laws, respectively, as follows:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">RESTATED ARTICLES OF INCORPORATION:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SIXTH: The Corporation shall, to the full extent permitted by Section&nbsp;8.75 of the Illinois
Business Corporation Act, as amended from time to time, indemnify all persons whom it may indemnify
pursuant thereto.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SEVENTH: No director of the Corporation shall be personally liable to the Corporation or its
shareholders for monetary damages, for breach of his fiduciary duty as a director; provided, that
nothing herein shall be construed to eliminate or limit the liability of a director (a)&nbsp;for any
breach of the director&#146;s duty of loyalty to the Corporation or its shareholders, (b)&nbsp;for acts or
omissions not in good faith or involving intentional misconduct or knowing violation of law, (c)
under Section&nbsp;8.65 of the Illinois Business Corporation Act, as amended, or (d)&nbsp;for any transaction
from which the director derived an improper personal benefit.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">AMENDED AND RESTATED BY-LAWS:
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">ARTICLE VI
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">INDEMNIFICATION OF<BR>
DIRECTORS, EMPLOYEES AND AGENTS

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Each person who at any time is or shall have been a director or officer of the corporation, or
is or shall have been serving at the request of the corporation as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust or other enterprise, shall be
indemnified by the corporation in accordance with and to the full extent permitted by the law of
the State of Illinois as in effect at the time of adoption of this By-law or as amended from time
to time. The foregoing right of indemnification shall not be deemed exclusive of any other rights
to which a person seeking indemnification may be entitled under
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="margin-left: 0%; text-indent: 0%; margin-right: 0%; font-size: 10pt; margin-top: 6pt">any By-law, agreement, vote of shareholders or disinterested directors or otherwise. Expenses
incurred in defending a civil or criminal action, suit or proceeding may be paid by the corporation
in advance of the final disposition of such action, suit or proceeding as authorized by the Board
of Directors in the specific case upon receipt of an undertaking by or on behalf of the director,
officer, employee or agent to repay such amount unless it shall ultimately be determined that he is
entitled to be indemnified by the corporation. If authorized by the Board of Directors, the
corporation may purchase and maintain insurance on behalf of any person to the full extent
permitted by the law of the State of Illinois as in effect at the time of the adoption of this
By-law or as amended from time to time.</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7. Exemption from Registration Claimed</B>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8. Exhibits</B>.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="80%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Restated Articles of Incorporation of the Registrant are
incorporated herein by reference to Exhibit&nbsp;3(a) to the
Registrant&#146;s Quarterly Report on Form&nbsp;10-Q (File No.&nbsp;0-21796) for
the quarter ended June&nbsp;30, 2003 filed with the Securities and
Exchange Commission on August&nbsp;13, 2003.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated By-Laws of the Registrant are incorporated
herein by reference to Exhibit&nbsp;3 to the Registrant&#146;s Quarterly
Report on Form&nbsp;10-Q (File No.&nbsp;0-21796) for the quarter ended March
31, 2004 filed with the Securities and Exchange Commission on May
10, 2004.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">The Company&#146;s 2006 Stock Incentive Plan is incorporated herein by
reference to Exhibit&nbsp;A to the Registrant&#146;s Definitive Proxy
Statement on Schedule&nbsp;14A filed with the Securities and Exchange
Commission on April&nbsp;7, 2006.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">The Company&#146;s Employee Stock Purchase Plan (as amended through May
17, 2006) is incorporated herein by reference to Exhibit&nbsp;B to the
Registrant&#146;s Definitive Proxy Statement on Schedule&nbsp;14A filed with
the Securities and Exchange Commission on April&nbsp;7, 2006.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Sidley Austin LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Sidley Austin LLP is contained in Exhibit&nbsp;5.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Powers of Attorney (contained in the signature pages hereto)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Filed herewith</TD>
</TR>

</TABLE>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">






<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9. Undertakings</B>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)&nbsp;The Company hereby undertakes:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)&nbsp;To file, during any period in which offers or sales are being made, a post-effective
amendment to this registration statement:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section&nbsp;10(a)(3) of the Securities Act;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date
of the registration statement (or the most recent post-effective amendment thereof) which,
individually or in the aggregate, represent a fundamental change in the information set forth
in the registration statement; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to such information
in the registration statement;
</DIV>

<DIV align="left" style="margin-left: 0%; text-indent: 0%; margin-right: 0%; font-size: 10pt; margin-top: 6pt"><I>provided, however</I>, that paragraphs (i)&nbsp;and (ii)&nbsp;do not apply if the information required to be
included in a post-effective amendment by those paragraphs is contained in periodic reports filed
with or furnished to the Commission by the registrant pursuant to Section&nbsp;13 or Section 15(d) of
the Exchange Act that are incorporated by reference in this registration statement.</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)&nbsp;That, for the purpose of determining any liability under the Securities Act, each such
post-effective amendment shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that time shall be deemed to be
the initial <I>bona fide </I>offering thereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3)&nbsp;To remove from registration by means of a post-effective amendment any of the securities
being registered which remain unsold at the termination of the offering.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;For purposes of determining any liability under the Securities Act, each filing of the
Company&#146;s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act that is
incorporated by reference in the registration statement shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such securities at that
time shall be deemed to be the initial <I>bona fide </I>offering thereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;Insofar as indemnification for liabilities arising under the Securities Act may be
permitted to directors, officers and controlling persons of the Company pursuant to the provisions
set forth above, or otherwise, the Company has been advised that in the opinion of the Commission
such indemnification is against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such liabilities (other than
the payment by the Company of expenses incurred or paid by a director, officer or controlling
person of the Company in the successful defense of any action, suit or proceeding) is asserted by
such director, officer or controlling person in connection with the securities being registered,
the Company will, unless in the opinion of its counsel the matter has been settled by
controlling precedent, submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities Act and will be
governed by the final adjudication of such issue.
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, the Company certifies that it has
reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has
duly caused this registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the Village of Vernon Hills, State of Illinois, on the 17th day of May, 2006.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left"><B>CDW CORPORATION</B><BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Barbara A. Klein
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Barbara A. Klein&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Senior Vice President and
<BR>Chief Financial Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>POWER OF ATTORNEY AND SIGNATURES</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We, the undersigned officers and directors of CDW Corporation, hereby severally constitute and
appoint Christine A. Leahy and Barbara A. Klein, our true and lawful attorneys, with full power to
each of them, to sign for us in our names in the capacities indicated below all post-effective
amendments to this registration statement, as amended, and generally to do all things in our names
and on our behalf in such capacities to enable CDW Corporation to comply with the provisions of the
Securities Act of 1933, as amended, and all requirements of the Securities and Exchange Commission.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has
been signed by the following persons in the capacities and on the date indicated.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="27%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ John A. Edwardson
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
John A. Edwardson
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chairman of the Board and Chief Executive
Officer <BR>(Principal Executive Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Barbara A. Klein
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Barbara A. Klein&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Senior Vice President and Chief Financial
Officer <BR>(Principal Financial Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Sandra M. Rouhselang
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Sandra M. Rouhselang
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice President and Controller
<BR>(Principal Accounting Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Michelle L. Collins
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Michelle L. Collins
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="27%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Casey G. Cowell
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Casey G. Cowell
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Daniel S. Goldin
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Daniel S. Goldin
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Thomas J. Hansen
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Thomas J. Hansen
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Donald P. Jacobs
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Donald P. Jacobs
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Stephan A. James
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Stephan A. James
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Michael P. Krasny
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Michael P. Krasny
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Terry L. Lengfelder
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Terry L. Lengfelder
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;11, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Susan D. Wellington
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Susan D. Wellington
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;17, 2006&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">By:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Brian E. Williams
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Brian E. Williams
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Dated: May&nbsp;15, 2006&nbsp;</TD>
</TR>
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</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXHIBIT INDEX</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="80%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Restated Articles of Incorporation of the Registrant are
incorporated herein by reference to Exhibit&nbsp;3(a) to the
Registrant&#146;s Quarterly Report on Form&nbsp;10-Q (File No.&nbsp;0-21796) for
the quarter ended June&nbsp;30, 2003 filed with the Securities and
Exchange Commission on August&nbsp;13, 2003.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated By-Laws of the Registrant are incorporated
herein by reference to Exhibit&nbsp;3 to the Registrant&#146;s Quarterly
Report on Form&nbsp;10-Q (File No.&nbsp;0-21796) for the quarter ended March
31, 2004 filed with the Securities and Exchange Commission on May
10, 2004.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">The Company&#146;s 2006 Stock Incentive Plan is incorporated herein by
reference to Exhibit&nbsp;A to the Registrant&#146;s Definitive Proxy
Statement on Schedule&nbsp;14A filed with the Securities and Exchange
Commission on April&nbsp;7, 2006.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">The Company&#146;s Employee Stock Purchase Plan (as amended through May
17, 2006) is incorporated herein by reference to Exhibit&nbsp;B to the
Registrant&#146;s Definitive Proxy Statement on Schedule&nbsp;14A filed with
the Securities and Exchange Commission on April&nbsp;7, 2006.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Sidley Austin LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Sidley Austin LLP is contained in Exhibit&nbsp;5.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Powers of Attorney (contained in the signature pages hereto)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Filed herewith</TD>
</TR>

</TABLE>




<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5
<SEQUENCE>2
<FILENAME>c05485exv5.htm
<DESCRIPTION>OPINION OF SIDLEY AUSTIN LLP
<TEXT>
<HTML>
<HEAD>
<TITLE>exv5</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="right" style="font-size: 10pt; margin-top: 12pt"><B>EXHIBIT 5</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">&#091;Sidley Austin LLP Letterhead&#093;
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">May&nbsp;17, 2006

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">CDW Corporation<BR>
200 N. Milwaukee Ave.<BR>
Vernon Hills, Illinois 60061

</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="10%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="25%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Re:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">CDW Corporation</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"><U>Registration Statement on Form&nbsp;S-8</U></TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Ladies and Gentlemen:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We refer to the Registration Statement on Form S-8 (the &#147;Registration Statement&#148;) being filed
by CDW Corporation, an Illinois corporation (the &#147;Company&#148;), with the Securities and Exchange
Commission (the &#147;Commission&#148;) under the Securities Act of 1933, as amended (the &#147;Securities Act&#148;),
relating to the registration of:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.&nbsp;4,660,000 shares of common stock, par value $0.01 per share, of the Company, to be issued
pursuant to the Company&#146;s 2006 Stock Incentive Plan (the &#147;2006 Plan&#148;), which was approved by the
Company&#146;s Board of Directors on March&nbsp;24, 2006, subject to shareholder approval, and
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.&nbsp;500,000 shares of common stock, par value $0.01 per share, of the Company (collectively
with the 4,660,000 shares referred to in (1)&nbsp;above, the &#147;Shares&#148;), to be issued pursuant to the
Company&#146;s Employee Stock Purchase Plan (the &#147;ESPP&#148;), under the terms of an amendment to the ESPP
(the &#147;Amendment&#148;) that was approved by the Company&#146;s Board of Directors on March&nbsp;24, 2006, subject
to shareholder approval.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We are familiar with the 2006 Plan, the Amendment, the ESPP, the Registration Statement, the
Restated Articles of Incorporation of the Company, the Amended and Restated By-Laws of the Company
and the resolutions of the Board of Directors of the Company relating to the 2006 Plan, the
Amendment, the ESPP and the Registration Statement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We have examined such records, documents and questions of law, and have satisfied ourselves as
to such matters of fact, as we have considered relevant and necessary as a basis for the opinions
set forth herein. We have assumed the authenticity of all documents submitted to us as originals,
the genuineness of all signatures, the legal capacity of all natural persons and the conformity
with the original documents of any copies thereof submitted to us for our examination.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Based upon the foregoing, we are of the opinion that:
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.&nbsp;The Company is duly incorporated and validly existing under the laws of the State of
Illinois.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.&nbsp;The Shares will be legally issued, fully paid and non-assessable when (i)&nbsp;the Registration
Statement, as finally amended, shall have become effective under the Securities Act; (ii)&nbsp;the
shareholders of the Company shall have approved the 2006 Plan and the Amendment; (iii)&nbsp;the
Company&#146;s Board of Directors or a duly authorized committee thereof shall have duly adopted final
resolutions authorizing the issuance and sale of the Shares as contemplated by the Registration
Statement, the 2006 Plan and the ESPP; and (iv)&nbsp;certificates representing such Shares shall have
been duly issued and sold in the manner provided in the 2006 Plan and the ESPP.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We do not find it necessary for the purposes of this opinion letter to cover, and accordingly
we express no opinion as to, the application of the securities or blue sky laws of the various
states or the District of Columbia to the issuance and sale of the Shares.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This opinion letter is limited to the laws of the State of Illinois.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We hereby consent to the filing of this opinion letter as an exhibit to the Registration
Statement and to all references to our firm included in or made a part of the Registration
Statement. In giving such consent, we do not thereby admit that we are within the category of
persons from whom consent is required by Section&nbsp;7 of the Act or the related rules promulgated by
the Commission.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">Very truly yours,<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">&nbsp;&nbsp;/s/ Sidley Austin LLP
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sidley Austin LLP&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>c05485exv23w1.htm
<DESCRIPTION>CONSENT OF PRICEWATERHOUSECOOPERS LLP
<TEXT>
<HTML>
<HEAD>
<TITLE>exv23w1</TITLE>
</HEAD>
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="right" style="font-size: 10pt; margin-top: 12pt"><B>EXHIBIT 23.1</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><U>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM</U>
</DIV>


<DIV align="left" style="margin-left: 0%; text-indent: 0%; margin-right: 0%; font-size: 10pt; margin-top: 6pt">We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of
our report dated March&nbsp;3, 2006 relating to the financial statements, financial statement schedule,
management&#146;s assessment of the effectiveness of internal control over financial reporting and the
effectiveness of internal control over financial reporting, of CDW Corporation, which appears in
CDW Corporation&#146;s Annual Report on Form 10-K for the year ended December&nbsp;31, 2005.</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="27%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ PricewaterhouseCoopers LLP
<DIV style="font-size: 10pt; border-top: 1px solid #000000">PricewaterhouseCoopers LLP&nbsp;</DIV>
Chicago, IL<BR>
May&nbsp;17, 2006
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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</DOCUMENT>
</SUBMISSION>
