Media Alert: Microsoft and Sun Provide Update

REDMOND, Wash. — May 10, 2005 –

What: Microsoft Corp. and Sun Microsystems Inc. press conference

Who: Microsoft Chief Executive Officer Steve Ballmer and Sun Microsystems Chairman and Chief Executive Officer Scott McNealy

When: Friday, May 13, 2005
News conference begins at 9:30 a.m. PDT (1:30 p.m. EDT)

Where: Garden Court Hotel
520 Cowper Street
Palo Alto, California 94301

Dial-In News Conference Information:

United States: (888) 692-0418
International: +1 (706) 643-7750
Pass code: 6172224

The news conference also will be webcast live at http://sun.com/news/features/sun_microsoft.html.

Live News Conference Satellite Coordinates:

U.S. Domestic Satellite: Galaxy 11
Transponder: 15 KU

Audio Replay Information:

An audio replay of the news conference will be available approximately one hour after the conference call has ended, until 9 p.m. PDT Thursday, May 19 (12 a.m. EDT, Friday, May 20).
United States: (800) 642-1687
International: +1 (706) 645-9291
(You must reference the conference ID number 6172224.)

Microsoft is a registered trademark of Microsoft Corp. in the United States and/or other countries.
Sun, Sun Microsystems, the Sun logo and The Network Is The Computer are trademarks or registered trademarks of Sun Microsystems Inc. in the United States and other countries.

Microsoft Contacts:

Media Only:
Rapid Response Team, Waggener Edstrom, (503) 443-7070, rrt@wagged.com

Financial Analysts Only:
Curt Anderson, Microsoft Investor Relations, (425) 706-3703

Sun Microsystems Contacts:

Media Only:
Jacki DeCoster, Sun Microsystems, (415) 294-4482, jacki.decoster@sun.com

Broadcast Media Only:
Karen Arena, Sun Microsystems, (732) 656-7861

Financial Analysts Only:
Paul Ziots, Sun Investor Relations, (650) 786-0411

Note to editors: If you are interested in viewing additional information on Microsoft, please visit the Microsoft® Web page at http://www.microsoft.com/presspass on Microsoft’s corporate information pages. Web links, telephone numbers and titles were correct at time of publication, but may since have changed. For additional assistance, journalists and analysts may contact Microsoft’s Rapid Response Team or other appropriate contacts listed at http://www.microsoft.com/presspass/contactpr.mspx.