<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>section302.txt
<DESCRIPTION>SECTION 302
<TEXT>
EX-99. CERT


CERTIFICATION PURSUANT TO RULE 30a-2(a) UNDER THE 1940 ACT AND SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002


I, Robert C. Doll, Jr., Chief Executive Officer (principal executive officer)
of BlackRock MuniYield Michigan Insured Fund, Inc., certify that:

1.  I have reviewed this report on Form N-Q of BlackRock MuniYield Michigan
    Insured Fund, Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement of
    a material fact or omit to state a material fact necessary to make the
    statements made, in light of the circumstances under which such statements
    were made, not misleading with respect to the period covered by this
    report;

3.  Based on my knowledge, the schedules of investments included in this
    report, fairly present in all material respects the investments of the
    registrant as of the end of the fiscal quarter for which the report is
    filed;

4.  The registrant's other certifying officer(s) and I are responsible for
    establishing and maintaining disclosure controls and procedures (as defined
    in Rule 30a-3(c) under the Investment Company Act of 1940) and internal
    control over financial reporting (as defined in Rule 30a-3(d) under the
    Investment Company Act of 1940) for the registrant and have:

a)  designed such disclosure controls and procedures, or caused such disclosure
    controls and procedures to be designed under our supervision, to ensure
    that material information relating to the registrant, including its
    consolidated subsidiaries, is made known to us by others within those
    entities, particularly during the period in which this report is being
    prepared;

b)  designed such internal control over financial reporting, or caused such
    internal control over financial reporting to be designed under our
    supervision, to provide reasonable assurance regarding the reliability of
    financial reporting and the preparation of financial statements for
    external purposes in accordance with generally accepted accounting
    principles;

c)  evaluated the effectiveness of the registrant's disclosure controls and
    procedures and presented in this report our conclusions about the
    effectiveness of the disclosure controls and procedures, as of a date
    within 90 days prior to the filing date of this report based on such
    evaluation; and

d)  disclosed in this report any change in the registrant's internal control
    over financial reporting that occurred during the registrant's most recent
    fiscal quarter that has materially affected, or is reasonably likely to
    materially affect, the registrant's internal control over financial
    reporting; and

5.  The registrant's other certifying officer(s) and I have disclosed to the
    registrant's auditors and the audit committee of the registrant's board of
    directors (or persons performing the equivalent functions):

a)  all significant deficiencies and material weaknesses in the design or
    operation of internal control over financial reporting which are reasonably
    likely to adversely affect the registrant's ability to record, process,
    summarize, and report financial information; and

b)  any fraud, whether or not material, that involves management or other
    employees who have a significant role in the registrant's internal control
    over financial reporting.


Date: September 20, 2007


/s/ Robert C. Doll, Jr.
-----------------------
Robert C. Doll, Jr.,
Chief Executive Officer (principal executive officer) of
BlackRock MuniYield Michigan Insured Fund, Inc.



EX-99. CERT


CERTIFICATION PURSUANT TO RULE 30a-2(a) UNDER THE 1940 ACT AND SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002


I, Donald C. Burke, Chief Financial Officer (principal financial officer) of
BlackRock MuniYield Michigan Insured Fund, Inc., certify that:

1.  I have reviewed this report on Form N-Q of BlackRock MuniYield Michigan
    Insured Fund, Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement of
    a material fact or omit to state a material fact necessary to make the
    statements made, in light of the circumstances under which such statements
    were made, not misleading with respect to the period covered by this
    report;

3.  Based on my knowledge, the schedules of investments included in this
    report, fairly present in all material respects the investments of the
    registrant as of the end of the fiscal quarter for which the report is
    filed;

4.  The registrant's other certifying officer(s) and I are responsible for
    establishing and maintaining disclosure controls and procedures (as defined
    in Rule 30a-3(c) under the Investment Company Act of 1940) and internal
    control over financial reporting (as defined in Rule 30a-3(d) under the
    Investment Company Act of 1940) for the registrant and have:

a)  designed such disclosure controls and procedures, or caused such disclosure
    controls and procedures to be designed under our supervision, to ensure
    that material information relating to the registrant, including its
    consolidated subsidiaries, is made known to us by others within those
    entities, particularly during the period in which this report is being
    prepared;

b)  designed such internal control over financial reporting, or caused such
    internal control over financial reporting to be designed under our
    supervision, to provide reasonable assurance regarding the reliability of
    financial reporting and the preparation of financial statements for
    external purposes in accordance with generally accepted accounting
    principles;

c)  evaluated the effectiveness of the registrant's disclosure controls and
    procedures and presented in this report our conclusions about the
    effectiveness of the disclosure controls and procedures, as of a date
    within 90 days prior to the filing date of this report based on such
    evaluation; and

d)  disclosed in this report any change in the registrant's internal control
    over financial reporting that occurred during the registrant's most recent
    fiscal quarter that has materially affected, or is reasonably likely to
    materially affect, the registrant's internal control over financial
    reporting; and

5.  The registrant's other certifying officer(s) and I have disclosed to the
    registrant's auditors and the audit committee of the registrant's board of
    directors (or persons performing the equivalent functions):

a)  all significant deficiencies and material weaknesses in the design or
    operation of internal control over financial reporting which are reasonably
    likely to adversely affect the registrant's ability to record, process,
    summarize, and report financial information; and

b)  any fraud, whether or not material, that involves management or other
    employees who have a significant role in the registrant's internal control
    over financial reporting.


Date: September 20, 2007


/s/ Donald C. Burke
--------------------
Donald C. Burke,
Chief Financial Officer (principal financial officer) of
BlackRock MuniYield Michigan Insured Fund, Inc.

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</DOCUMENT>
