Its a long shot that many people will have this issue but hey why not!

If you have one of the uber new AMD FX Processors (e.g. the 6 core 6100BE) and have tried to run a Windows Server 2008 R2 virtual machine on it you may have seen this error message.

An error occurred while attempting to start the selected virtual machine(s).

‘<VM name>’ could not initialize.

The virtual machine could not be started because the hypervisor is not running.

The cause of this issue is well documented in Microsoft KB 2568088 (link), the short version is the newer AMD CPUs have a feature called AVX included that Hyper-V does not like very much.

As such you can sort this issue out by running the command bcdedit /set xsavedisable 1 at a elevated command prompt.

Just make sure you restart your PC after and boom you will be able to run your virtual machines again!

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One Response to AMD FX and Hyper-V – Hypervisor is not running

  • Nick De Vera says:

    Thank you for echoing the problem documented in MS KB 2568088 here. I have been looking around for a possible fix until I came across this post! I have AMD FX 8-cores processor running Windows 2008 R2 and your solution fixed my problem! Thanks a lot!

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