Hyper V VM not starting

Aristos 6

We have 2 VMs on a Windows Server 2019 where since yesterday one of two wont turn on after we disabled the dynamic memory setting and did a restart. The error we get is the following
"hyper v failed to start worker process. the instruction at 0x%p referenced memory at 0x%p. The memory could not be %s. (0xc0000006)."
What I've tried so far is to delete that VM and created a new one which also got the same error while trying to start it. The one working VM was on a saved state but after restart of the physical server it worked.
Any suggestions?

Yuhan Deng 3,766 Reputation points Microsoft Vendor

2021-07-26T05:57:42.987+00:00

Hi Aristos,
I would like to check if the reply could be of help? If yes, please help accept answer, so that others meet a similar issue can find useful information quickly. If you have any other concerns or questions, please feel free to feedback.

Best regards,
Danny
Aristos 6 Reputation points

2021-07-26T06:01:18.843+00:00

Hi Danny

We didn't try anything further yet. Due to some necessary services running on the server we've schedule further troubleshoot on Thursday so I'll try then and I'll update accordingly.
Yuhan Deng 3,766 Reputation points Microsoft Vendor

2021-07-26T06:11:01.337+00:00

Hi Aristos,
Noted. Let's see what happens.

Best regards，
Danny
Aristos 1 Reputation point

2021-08-03T08:25:06.18+00:00

Hi Danny. Just to update on the matter.

The issue is resolved but I haven't figured out what cause the problem. We've resolved it by formatting the physical server and setting up Hyper-V and VMs again.

Initially though I've uninstalled and re-installed Hyper-V and imported the VMs from backup but still it wouldn't let us create new VMs and couldn't start the existing ones. So we had no choice but to rebuilt the whole server.

Thanks
Aristos

1 answer

Yuhan Deng 3,766 Reputation points Microsoft Vendor

2021-07-21T02:02:00.127+00:00

Hi,
I did some research and found the article below, maybe you can take a look:
https://www.auslogics.com/en/articles/fix-status-in-page-error-0xc0000006-error/
Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.

If it doesn’t work, please try reinstalling the hyper-v feature.

Thanks for your time.
Best Regards,
Danny

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Aristos 6 Reputation points

2021-07-21T05:29:21.55+00:00

Thank you. I'll try any possible solutions from that article today. Although the most obvious of a clean boot is a bit last case scenario. Hope something else in there works.

Yuhan Deng 3,766 Reputation points Microsoft Vendor

2021-07-21T05:48:37.657+00:00

Hi Aristos，
Thanks for your feedback，let's see what happens.

Best regards,
Danny

Aristos 6 Reputation points

2021-07-22T10:45:33.29+00:00

Something its definitely wrong with Hyper-V. After SFC scan it wont let create a new virtual machine. As there is one VM that is crucial and seems to work fine I can't troubleshoot any more. We will schedule a downtime and either uninstall Hyper-V and install it again hoping that will resolve the issue or clean install Win Server if nothing else works.

Yuhan Deng 3,766 Reputation points Microsoft Vendor

2021-07-23T01:40:54.6+00:00

Hi Aristos,
Thanks for your feedback. Please try reinstalling the Hyper-V feature and see if it works. If the issue remains, you might need to reinstall the system.

Best regards,
Danny
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