- Turn Off your virtual machine and run the command on the physical Hyper-V host:
Set-VMProcessor -VMName <VMName> -ExposeVirtualizationExtensions $true
- Start the virtual machine.
Reference: Run Hyper-V in a Virtual Machine with Nested Virtualization
Set-VMProcessor -VMName <VMName> -ExposeVirtualizationExtensions $true
Reference: Run Hyper-V in a Virtual Machine with Nested Virtualization