Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-118764 and No. 333-185757 on Form S-8 of our report dated June 26, 2013, appearing in this Annual Report on Form 11-K of Microsoft Corporation Savings Plus 401(k) Plan for the year ended December 31, 2012.

/s/ DELOITTE & TOUCHE LLP

Seattle, Washington

June 26, 2013

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