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Article ID: 2691586 - Last Review: October 9, 2012 - Revision: 4.0


This update extends the Key Management Service (KMS) for Windows Vista, for Windows Server 2008, for Windows 7, and for Windows Server 2008 R2 to enable the enterprise licensing of Windows 8 and of Windows Server 2012.

KMS provides support for the following KMS client activations:
  • Windows Server 2008 R2
  • Windows Server 2008
  • Windows 8
  • Windows Server 2012
  • Windows 7
  • Windows Vista
KMS uses a KMS host key to activate itself on a KMS host and to establish a local activation service in your environment. This update extends support for KMS to provide activation for Windows 8 and for Windows Server 2012.

More information

Important The orginal packages are affected by the issue that is described in Microsoft Security Advisory 2749655 ( . In this issue, the digital signature on files that are produced and signed by Microsoft expire prematurely, and are therefore no longer available. The latest packages for this issue are now available for download in the following Microsoft Knowledge Base article:
2757817  ( )  An update that adds support for Windows 8 and for Windows Server 2012 to Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 KMS hosts is available

Applies to
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Web Server 2008 R2
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
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