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Overview
The Windows Server 2008 R2 Migration Utilities package works with Windows Server Migration Tools to let you migrate Hyper-V and Routing and Remote Access Services. Detailed, step-by-step information about how to use the Windows Server 2008 R2 Migration Utilities package to complete these migrations is available in the Hyper-V Server Migration Guide and the Routing and Remote Access Server Migration Guide . After you install this item, you may have to restart your computer.
http://www.microsoft.com/downloads/details.aspx?FamilyID=5c1ec14a-e9d7-46ea-9c6e-73d6bc4219b4&displaylang=en
Read the complete post at http://wmug.co.uk/blogs/cliffs_blog/archive/2010/02/26/hyper-v-windows-server-2008-r2-migration-utilities-x64-edition-kb977336.aspx