Au cas ou vous cherchez a installer un cluster Hyper-V....

 

The latest Hyper-V service packs, updates, and hotfixes for Windows Server 2008 R2 are listed here in chronological order.

Last Updated: February 16, 2012

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Updates that are available on Windows Update are indicated, as well as the download location for those that are available at the Microsoft Download Center. These updates and hotfixes can help avoid some known issues and may save you a support call. 

http://social.technet.microsoft.com/wiki/contents/articles/1349.hyper-v-update-list-for-windows-server-2008-r2.aspx