Hyper V- quick help- Hypervisor not starting issue

Question

So I had this good working HyperV VM machine (windows ); couple of years, working fine.

Now suddenly it gives this error (below)

`Virtual Machine Connection

The application encountered an error while attempting to change the

state of 'XXXXX'.

'XXXXX' failed to start.

Virtual machine 'XXXXX' could not be started because the hypervisor is not

running.

See details

Virtual Machine Connection  The application encountered an error while attempting to change the  state of 'XXXXX'.  'XXXXX' failed to start.  Virtual machine 'XXXXX'. could not be started because the hypervisor is not  running. 

'XXXXX' failed to start. (Virtual machine ID  8El XXXXXX7CCC98)  Virtual machine 'XXXXX' could not be started because the hypervisor is not  running (Virtual machine ID 8El XX238-504D-XX_XXX_XX_587XXXX).  The following actions may help you resolve the problem:  1) Verify that the processor of the physical computer has a supported version of  hardware-assisted virtualization.  2) Verify that hardware-assisted virtualization and hardware-assisted data execution  protection are enabled in the BIOS of the physical computer. (If you edit the BIOS to  enable either setting, yqyu must turn off the power to the physical computer and then  turn it back on. Resetting the physical computer is not sufficient.)  3) If you have made changes to the Boot Configuration Data store, review these  changes to ensure that the hypervisor is configured to launch automatically.  `

I've tried multiple online resources on how to start hypervisor , but they do not work.

Could someone help me pls, recover my VM - it has some really imp. installs.

Answer 1

Ok, I can try. But pls. send the other steps to recreate or copy my existing VM (and all software on it) to this new instance if it works? And do you know how to re-start or repair hypervisor itself? Perhaps that shd. be first step? or if there're any setting to be tweaked for Hyper V to get hypervisor to behave.

The simplest and probably quickest solution here would be to export or copy off the VHD, clean install the host operating system, patch fully, add hyper-v role, then create a new VM on with an identical configuration as existing, then when you get to step Connect Virtual Hard Disk choose Use an existing virtual hard disk and point to the VHD. This, of course, assumes the VHD itself is not somehow problematic.

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Answer 2

Do any other VMs start? Might try creating a new virtual machine for testing. Also try copying the VHD to another hypervisor for testing.

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Answer 3

Sounds good, I'd suggest try standing up a new one for testing.

https://learn.microsoft.com/en-us/virtualization/hyper-v-on-windows/quick-start/quick-create-virtual-machine

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Answer 4

I dont think its new ask and not sure what this gets you but anyways I'll do as you asked