Hypervisor is greyed out after 21H! update


  1. Petrus07
    Posts : 15
    Windows 10 Pro 64bit
       New #1

    Hypervisor is greyed out after 21H! update


    Hi,
    I updated Win 10 Pro 64bit to Version 21H1 (Build 19043.985) and all is OK excepting Hyper-V Hypervisor, it’s greyed out. So, I can’t create a dual boot Windows-Macrium using viBoot of Macrium Reflect 7 as I had in my HP Envy Notebook, prior to this recent update.
    I tried to fix it by means of DISM /Online /Enable-Feature /All /FeatureName:Microsoft-Hyper-V with CMD and PowerShell sessions (as Administrator) and through Settings (Programs and Features, Turn Windows Features on or off), but problem remains.
    I will appreciate help and suggestions.
    Best regards
      My Computer
    Quote Quote

  3. Bree
    Posts : 31,692
    10 Home x64 (22H2) (10 Pro on 2nd pc)
       New #2

    Petrus07 said:
    I updated Win 10 Pro 64bit to Version 21H1 (Build 19043.985) and all is OK excepting Hyper-V Hypervisor, it’s greyed out. So, I can’t create a dual boot Windows-Macrium using viBoot of Macrium Reflect 7 as I had in my HP Envy Notebook, prior to this recent update.....
    I upgraded two machines that had Hyper-V to 21H1 with no such problem....

    Hypervisor is greyed out after 21H! update-image.png

    I would check your boot entries to see if somehow Hypervisor has been turned off. This tutorial from @Kari tells you how to do that.

    Run Hyper-V, VirtualBox and VMware on same Computer

    Have you updated your BIOS recently? If so, I'd check in your bios settings to see if Virtualisation has been reset to OFF by default.
      My Computers
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  4. Petrus07
    Posts : 15
    Windows 10 Pro 64bit
    Thread Starter
       New #3

    Many thanks, Bree, for your response including the link to Kari's Tutorial.
    No, I didn't updated recently my BIOS.
    As the hypervisorlaunch type is 'auto' (enabled), therefore it will be switched to 'off'.
    Kind regards.
      My Computer
    Quote Quote

 

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