"Unsupported configuration" warning when you run a Windows 8-based or Windows Server 2012-based virtual machine in Windows Server 2008 R2

Applies to: Windows Server 2008 R2 DatacenterWindows Server 2008 R2 EnterpriseWindows Server 2008 R2 Standard
Virtual Agent: "Want help? I can help you fix this issue."

Symptoms

Consider the following scenario:
  • You install the Hyper-V role on a computer that is running Windows Server 2008 R2.
  • You run a Windows 8-based or Windows Server 2012-based virtual machine on the computer.
In this scenario, the following Warning event is logged in the Hyper-V-Worker or Hyper-V-Integration log:For example, the following Warning event is logged in the Hyper-V-Worker log:

Resolution

This is a known issue that occurs when a virtual machine that is running Windows 8 or Windows Server 2012 is hosted in Windows Server 2008 R2. You can safely ignore the warning message. 

More Information

For more information about an update that enables Windows 8-based or Windows Server 2012-based virtual machines in Windows Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base:
2526776

An update that enables Windows 8 or Windows Server 2012 to be hosted in a Hyper-V virtual machine on Windows Server 2008 R2