If you’re going to run Windows 8 or Windows Server 2012 in a virtual machine on Windows Server 2008 R2 Hyper-V, please install this hotfix patch http://support.microsoft.com/kb/2744129 on the Hyper-V host server,
Without applying this hotfix, you may experience one or more of the following issues:
- The Windows 8/Server 2012 virtual machine becomes unresponsive.
- The Windows Server 2008 R2 host server displays a stop error message and restarts automatically.
Update: the http://support.microsoft.com/kb/2744129.has been added to Windows Auto Update.