UNITED STATES OF AMERICA,                                                         Plaintiff,                            v. MICROSOFT CORPORATION,                                       Defendant.

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Civil Action No. 98-1232 (CKK) Next Court Deadline: None

PLAINTIFF UNITED STATES' NOTICE OF ATTORNEY SUBSTITUTION AND CHANGE OF ADDRESS

Plaintiff United States of America submits this Notice of Attorney Substitution and Change of Address in the above-captioned case. Currently listed as counsel of record for Plaintiff United States are Renata B. Hesse, Phillip R. Malone, Mary Jean Moltenbrey, Jacqueline S. Kelley, and Special Trial Counsel Philip S. Beck. Mary Jean Moltenbrey, Jacqueline S. Kelley, and Philip S. Beck should be removed from the list of counsel for Plaintiff United States and substituted by Patricia A. Brink and Paula L. Blizzard. Pursuant to LCvR 83.2(j), Plaintiff files herewith Attorney Certifications for Patricia A. Brink and Paula L. Blizzard.

The correct address and telephone number for counsel of record Renata B. Hesse, Phillip R. Malone, Patricia A. Brink, and Paula L. Blizzard should be U.S. Department of Justice, Antitrust Division, 600 E Street, N.W., Suite 9500, Washington, D.C. 20530, (202) 514-8276, changed from 601 D Street N.W., Washington D.C. 20530. All future correspondence, service of pleadings, and other documents submitted in this case should be directed to Renata B. Hesse at the corrected address. Pursuant to LCvR 83.15(c), Plaintiff files herewith a Praecipe reflecting this change.

Dated: March________, 2003

Respectfully submitted,

_______________________________ PHILLIP R. MALONE RENATA B. HESSE PAULA L. BLIZZARD PATRICIA A. BRINK JOAN V. FARRAGHER JEFFREY D. NEGRETTE BARBARA J. NELSON JEFFREY J. VANHOOREWEGHE Trial Attorneys U.S. Department of Justice Antitrust Division 600 E Street, N.W. Suite 9500 Washington, D.C. 20530 202/514-8276