
<PAGE>

                                                                   EXHIBIT 99(C)

                   AON TO ACQUIRE ASI SOLUTIONS INCORPORATED;
    STRENGTHENING HUMAN RESOURCES ADMINISTRATION AND COMPENSATION CONSULTING
                            CAPABILITIES FOR CLIENTS


Chicago, IL--February 23, 2001--Aon Corporation (NYSE: AOC) announced today
that it has entered into a definitive agreement to acquire ASI Solutions
Incorporated (ASI), (NASDAQ: ASIS), a worldwide provider of human resources
administration and compensation consulting services, headquartered in New York.
ASI will operate as part of Aon Consulting Worldwide, Inc. The transaction
involves an exchange of Aon common shares for ASI shares and is subject to
regulatory and ASI shareholder approval. The transaction is expected to be
completed within the next 90 days. The proposed acquisition is not expected to
have a material impact on Aon's earnings per share in 2001.

      "Our clients increasingly face critical issues of attraction, retention
and productivity of employees and we believe ASI addresses these key needs,"
stated Patrick G. Ryan, chairman and chief executive officer, Aon Corporation.
"ASI will extend our services in employment process outsourcing, performance
improvement services, and compensation consulting--including McLagan Partners,
the leading compensation consultancy to the financial services industry."

      ASI has over 500 employees worldwide with offices in New York, Chicago,
Melville (NY), St. Louis, San Francisco, Stamford (CT) and Washington, D.C., as
well as London, Tokyo and Hong Kong. ASI was named one of Forbes Magazine's 100
Best Small Companies in 2000.

      Donald C. Ingram, chairman and chief executive officer, Aon Consulting
Worldwide, stated: "By adding ASI's capabilities we will greatly strengthen our
human resources outsourcing and compensation consulting services. Together with
ASI's management team, we look forward to building our worldwide business."

      ASI is a leading international provider of human resources outsourcing
services for large organizations that strive to hire, train and develop a higher
quality, more effective workforce. Services include three core areas:
performance improvement, employment process outsourcing and compensation and
market share studies. For over 20 years, ASI has provided solutions for
organizations which outsource all or a portion of these human resource
functions.

      Bernard F. Reynolds, chief executive officer of ASI, commented: "By
joining forces with one of the largest employee benefit, human resources and
management consulting organizations in the world we know that our ability to
broaden, deepen and expand the quality services we offer both our clients and
Aon's will be assured into the future. At the same time, our management and
staff will become an integral part of an excellent company committed to growing
this business through continued investment in people and solutions that provide
outstanding client service. We look forward to making that journey together."

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ABOUT AON

      Aon Corporation (www.aon.com) is a holding company that comprises a family
of insurance brokerage, consulting and insurance underwriting subsidiaries.
Aon's common stock is listed on the New York, Chicago, Frankfurt and London
stock exchanges.

      Aon Consulting Worldwide is among the world's top global human resource
consulting firms with 2000 revenues of $770 million and 6,600 employees in over
120 offices worldwide. Aon Consulting delivers integrated solutions to help
clients with employee benefits, compensation, human resources and management
consulting.


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THIS PRESS RELEASE INCLUDES CERTAIN FORWARD-LOOKING STATEMENTS WITHIN THE
MEANING OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995, INCLUDING
STATEMENTS CONCERNING THE POSSIBLE OUTCOME OF THE TRANSACTION, THE IMPACT OF THE
TRANSACTION ON ASI OR AON OR THE PRICE OF THEIR STOCK, AND THE ANTICIPATED
TIMING OF THE CLOSING. ANY SUCH STATEMENTS ARE SUBJECT TO RISKS THAT COULD CAUSE
THE ACTUAL RESULTS TO VARY MATERIALLY FROM HISTORICAL RESULTS OR THOSE
ANTICIPATED, DEPENDING ON A VARIETY OF FACTORS INCLUDING ASI'S OR AON'S ABILITY
TO SATISFY THE CLOSING CONDITIONS SET FORTH IN THE MERGER AGREEMENT, GENERAL
ECONOMIC CONDITIONS IN DIFFERENT COUNTRIES AROUND THE WORLD, FLUCTUATIONS IN
GLOBAL EQUITY AND FIXED INCOME MARKETS, CHANGES IN COMMERCIAL PROPERTY AND
CASUALTY PREMIUM RATES, THE COMPETITIVE ENVIRONMENT, THE ACTUAL COST OF
RESOLUTION OF CONTINGENT LIABILITIES, THE FINAL FORM OF THE BUSINESS
TRANSFORMATION PLAN, THE ULTIMATE COST AND TIMING OF THE IMPLEMENTATION THEREOF
AND THE ACTUAL COST SAVINGS AND OTHER BENEFITS RESULTING THEREFROM. FURTHER
INFORMATION CONCERNING THE COMPANY AND ITS BUSINESS, INCLUDING FACTORS THAT
POTENTIALLY COULD MATERIALLY AFFECT THE COMPANY'S FINANCIAL RESULTS ARE
CONTAINED IN THE COMPANY'S FILINGS WITH THE SECURITIES AND EXCHANGE COMMISSION.


Aon Corporation plans to file a registration statement with the SEC which will
include a proxy statement/prospectus that ASI Solutions Incorporated plans to
mail to its stockholders containing information about the merger. Investors and
securityholders of Aon and ASI are advised to read the proxy
statement/prospectus carefully when it becomes available because it will contain
important information about Aon and ASI, the merger, the persons soliciting
proxies related to the merger, their interest in the merger, and related
matters. Investors and securityholders may obtain free copies of the proxy
statement/prospectus (when available) and other documents filed by Aon at the
Securities and Exchange Commission's website at http://www.sec.gov. Free copies
of the proxy statement/prospectus also will be available from Aon by directing
such requests to the attention of Sean O'Neill, Vice President, Financial
Relations, 312-701-3983.

