An error occurred while attempting to connect to a Hyper-V server

by | Jul 4, 2017 | Hyper-V, WMI | 20 comments

While setting up a new Hyper-V failover cluster I got an error when trying to connect using the Hyper-V manager console:

An error occurred while attempting to connect to server “[computername]”. Check that the Virtual Machine Management service is running and that you are authorized to connect to the server.
Hyper-V encountered an error trying to access an object on Computer ‘[computername]’ because the object was not found. The object might have been deleted. Verify that the Virtual Machine Management service on the computer is running.

There is nothing in the logs and everything I tried didn’t work. In the end uninstalling the Hyper-V role and reinstalling it did fix the issue. However, sometimes simply reinstalling roles is not possible. When I experienced the same error again on another machine I investigated a bit more and finally ended up in restoring the Hyper-V WMI registration which fixed the issue without reinstalling the role.

You can do so by running the following command in an elevated command prompt:

MOFCOMP %SYSTEMROOT%\System32\WindowsVirtualization.V2.mof

20 Comments

  1. Jesper on October 4, 2017 at 16:23

    Thanks, it worked perfectly! Thumbs up. :-)

  2. Dave84620 on November 15, 2017 at 15:23

    Thank you, that saved me a lot of time. I was about to re-install the whole machine to be sure that everything works fine. I assume that the error occured because I installed HPE Management Software which depends on WMI right after I installed the Hyper-V role. I wasn’t aware that this destroys the whole system ;o)

    Best regards
    Dave :o)

  3. Simon D on December 23, 2017 at 15:14

    Thankyou, you saved me a world of pain !

  4. Jeremy on April 20, 2018 at 02:15

    Thanks that worked perfectly.

  5. sandeep on April 22, 2018 at 18:03

    Thanks a lot. It worked for me too.

  6. GV on May 2, 2018 at 12:50

    Thanks!!

  7. Rune on May 15, 2018 at 16:15

    Thanks a lot.
    Worked like a charm.

  8. saraga on May 28, 2018 at 03:32

    Thanks a lot.

  9. Greg on June 29, 2018 at 16:59

    Just had the issue today. Did a google search and your article came up on top. Lucky me. This fixed it. Thank you.

  10. Martijn Daas on July 16, 2018 at 21:58

    Thank you!
    As somebody mentioned here also, it has something to do with installing HPE System Management Homepage after installing Hyper-V.
    Nice find, thumbs up.

  11. Ceraz24 on July 21, 2018 at 16:11

    I can confirm this fixed it for me as well. I had the Homepage already installed but only when I installed the WBEM Provider Packager – cp031735 the error occured (for me at least)

    Cheers

  12. ernesto on July 24, 2018 at 19:19

    before doing this, use your domain administrator credentials if you have one if not use this command.

  13. Yevgeny on July 30, 2018 at 20:12

    I got messege: file not found.

  14. Guruprasad on July 31, 2018 at 16:21

    File ‘C:\WINDOWS\System32\WindowsVirtualization.V2.mof’ not found!

  15. Bruno Moura on September 11, 2018 at 00:53

    UAU!! Thanks!!

  16. Dan Regalia on September 18, 2018 at 07:52

    Got this as a reply: Windows PowerShell
    Copyright (C) Microsoft Corporation. All rights reserved.

    PS C:\WINDOWS\system32> MOFCOMP %SYSTEMROOT%\System32\WindowsVirtualization.V2.mof
    Microsoft (R) MOF Compiler Version 10.0.17134.1
    Copyright (c) Microsoft Corp. 1997-2006. All rights reserved.
    Parsing MOF file: C:\WINDOWS\System32\WindowsVirtualization.V2.mof
    MOF file has been successfully parsed
    Storing data in the repository…
    An error occurred while opening the namespace for object 1:
    0X80041002 Class, instance, or property ” was not found.
    Compiler returned error 0x80041002
    PS C:\WINDOWS\system32>

  17. Eddie on September 21, 2018 at 12:25

    Thanks for this article, it fixed the issues I was having with HyperV manager and HyperV 2016 core server.

  18. Jeff on October 10, 2018 at 20:39

    Worked perfectly! Thanks for posting!

  19. JonR on October 27, 2018 at 17:57

    Wow. Thank you for this simple and effective article. Also happened after HPE software install.

  20. Jason H on November 14, 2018 at 01:28

    This fixed it! Thanks! Issue occurred on 11/13/2018 spontaneously on a computer I use Hyper-V on extensively. I literally had several VMs already open, left for a meeting, and came back to this error. Rebooting did not solve it. This did.

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