Assume that you have a Hyper-V host that is running 64-bit Windows 8.1 or Windows Server 2012 R2. When you try to perform live migration to move the virtual machine to another Hyper-V host, the operation fails and the virtual machine freezes in "Turning Off" state.
To resolve this issue, install update rollup 2955164. For more information about how to obtain this update rollup package, click the following article number to view the article in the Microsoft Knowledge Base:
2955164 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: May 2014
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates