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More Information Update information How to obtain this update This update extends support for KMS to provide activation for Windows 8 and for Windows Server 2012. KMS uses a KMS host key to activate itself on a KMS host and to establish a local activation service in your environment. KMS provides support for the following KMS client activations: 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. Windows Server 2008 Datacenter Windows Server 2008 Datacenter without Hyper-V Windows Server 2008 Enterprise Windows Server 2008 Enterprise without Hyper-V Windows Server 2008 for Itanium-Based Systems Windows Server 2008 Foundation Windows Server 2008 Standard Windows Server 2008 Standard without Hyper-V Windows Server 2008 Web Edition Windows 7 Enterprise Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional Windows 7 Starter Windows 7 Ultimate Windows Server 2008 R2 Datacenter Windows Server 2008 R2 Enterprise Windows Server 2008 R2 for Itanium-Based Systems Windows Server 2008 R2 Foundation Windows Server 2008 R2 Standard Windows Server 2008 R2 Web Edition More.