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Is it possible to enable vt-x for a Hyper-V guest?

I need to run a 64 bit guest inside of a 64 bit guest.

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I don't believe that you can run Hyper-V within a guest as there is already a hypervisor running. (Pretty sure it tells you this if you try and install the hyper-v role).

I think your just going to have to run these other machines on the host server.

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  • When Hyper-V is installed, the hypervisor is running all the time underneath the host OS, and only one thing can control the VT hardware at a time for stability. The hypervisor blocks all other calls to the VT hardware. Hence you cannot enable/use VT-x for guest in guest
    – clhy
    Jul 17, 2015 at 12:37
  • Maybe time to update the answer. docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/…
    – davejal
    Apr 6, 2017 at 20:07
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Now you can; you got to run this in an admin powershell console, on a stopped vm.

Set-VMProcessor -VMName <vm name> -ExposeVirtualizationExtensions $true

Official documentation

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  • Worked for me. In my case I needed to run a Ubuntu 18.04 as guest and inside it I installed VirtualBox so to be able to run 64 bit images (in my case minikube)
    – Sebb77
    Sep 13, 2018 at 12:54

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