Hi all,

Having a bit of a nightmare with Hyper-V on my Windows 8 Pro laptop - Whenever I create a new VM and try to start it I receive the following error;

'Failed to start the virtual machine 'test' because one of the Hyper-V components is not running.'

I sometimes also receive an error saying something along the lines of 'Unable to change virtual machine state'

I have done a lot of searching a seen two common answers - The first is to try removing the Hyper-V role and re-adding it - I have tried this several times to no avail. (Intel VT and all virtualisation capabilities are enabled in BIOS). The second issue it would seem some people have had relates to editing the VMX configuration file and adding the line hypervisor.cpuid.v0 = "FALSE" - I thought VMX files were only present in VMware Virtual Machines...

Any help would be greatly appreciated.

Many thanks in advance.

James

you are right.  VMX files are only present with VMware virtual machines.

Does this: http://support.microsoft.com/kb/2761004

apply to your situation?

or; http://social.technet.microsoft.com/Forums/windows/en-US/223443d6-659a-4e24-8a23-4cb11f0c3156/windows-8-hyperv-virtual-machine-management-service-failed-to-start-the-virtual-machine

Hi Brian,

The first one does look like it could be the one... The second link I'd already seen and it isn't that, all devices are fully installed, thanks all the same.

In reading the KB article from the firs link the 'Workaround' is listed as; 'To work around this issue, disable the I/O verification option in Driver Verifier for all drivers on the host computer.' That's as much depth as the article goes into and I'm afraid I'm not sure how to do this... I was wondering if this is something you've done before?

Many thanks,

James

I have never had to mess with it.

But these two articles seem to put the pieces together:

http://msdn.microsoft.com/en-us/library/windows/hardware/ff545448(v=vs.85).aspx

http://support.microsoft.com/kb/244617/en-us

It definitely is a strange thing.

Hi Brain, thanks for the swift reply.

I've looked at my Driver Verifier Manager and they are all set to disabled...

So it is perhaps not this issue after all... :(

Any further ideas per chance?!

James

Can you please check the following:

1. Please check the System event log for events logged with a source of Hyper-V-Hypervisor there should be an event indicating that Hypervisor successfully started.
2. Please check the Hyper-V event logs (Applications and Services Logs -> Microsoft -> Windows -> Hyper-V-*) specifically check the VMMS and Hypervisor logs for errors.
3. Please check if the following services are running: VID and VMBUS.  You can check them by running the following commands from an elevated command prompt.
   sc queryex vid
   sc queryex vmbus

-Taylor BrownProgram Manager, Hyper-V

Hi Taylor,

1.) System event log shows 'Hypervisor successfully started', but bizarrely the last event is yesterday... Though today I have opened Hyper-V and tried again to launch a VM so not sure if I should be seeing an event for today or not...

2.) In the Hyper-V-VMMS logs I consistently receive two errors;

AND

3.) 'vid' service is running, 'vmbus' is not however...

I hope this helps!

Many thanks,

James