Microsoft Corporation (the "Company") is filing this Current Report on Form 8-K for the purpose of providing additional information regarding a previously announced change in the Company's presentation of gains and losses resulting from foreign currency remeasurements and in conjunction with the Registration Statement on Form S-3 that the Company is filing on the date hereof to register debt securities that the Company may offer from time to time. As disclosed in its Form 10-Q for the quarter ended September 30, 2008, effective July 1, 2008, the Company began presenting gains and losses resulting from foreign currency remeasurements as a component of other income, net. Prior to that date, the Company included gains and losses resulting from foreign currency remeasurements as a component of sales and marketing expense. The Company changed its presentation because the modified presentation better reflects how it manages its foreign currency exposures, and as such gains and losses arising from the remeasurement of foreign currency transactions are incidental to its operations.

In connection with the change in the Company's presentation of gains and losses resulting from foreign currency remeasurements, we are providing recast financial information previously disclosed in the Company's Annual Report on Form 10-K for the fiscal year ended June 30, 2008. This information (attached hereto as Exhibits 99.1, 99.2, and 99.3) includes selected updated information from certain parts of the Company's Annual Report on Form 10-K for the fiscal year ended June 30, 2008 that were impacted by the presentation change, including:

• Part II, Item 6. Selected Financial Data;

• Part II, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations (sections only); and

• Part II, Item 8. Financial Statements (excluding supplementary data).

The following gains and losses resulting from foreign currency remeasurements were previously recorded as a component of sales and marketing expense and have been recast as other income, net in the attached exhibits: fiscal year ended June 30, 2008 - $221 million gain; fiscal year ended June 30, 2007 - $86 million gain; fiscal year ended June 30, 2006 - $92 million gain; fiscal year ended June 30, 2005 - $15 million loss; and fiscal year ended June 30, 2004 - $74 million loss.

(d) Exhibits

Exhibit   Description
99.1      Item 6. Selected Financial Data (as recast for change in presentation of
          gains and losses resulting from foreign currency remeasurements)

99.2      Item 7. Sections of Management's Discussion and Analysis of Financial
          Condition and Results of Operations (as recast for change in presentation
          of gains and losses resulting from foreign currency remeasurements)

99.3      Item 8. Financial Statements (excluding supplementary data, as recast for
          change in presentation of gains and losses resulting from foreign currency
          remeasurements)

99.4      Consent of Deloitte & Touche LLP