Details of the announcement will be provided during a press teleconference.

REDMOND, Wash., -- Feb. 21, 2008

Who: Steve Ballmer, chief executive officer of Microsoft Corp.; Ray

When: 8:30 a.m. PST (17:30 CET) to 9:15 a.m. PST (18:15 CET), Thursday,

Feb. 21, 2008

Teleconference

Information: Listen-only news conference

United Kingdom Birmingham 44-121-210-9029 0800-279-9630

United Kingdom Glasgow 44-141-202-3229 0800-279-9630

United Kingdom Leeds 44-113-301-2129 0800-279-9630

United Kingdom London 44-20-7108-6390 0800-279-9630

United Kingdom Manchester 44-161-601-1429 0800-279-9630

Transcript: A written transcript of the news conference will be

Audio Replay

Information: An audio replay of the news conference will be available

For more information, press only:

Rapid Response Team, Waggener Edstrom Worldwide, (503) 443-7070,

rrt@waggeneredstrom.com

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SOURCE Microsoft Corp.