Invoke-WebRequest https://raw.githubusercontent.com/Microsoft/Virtualization-Documentation/master/hyperv-tools/Nested/Enable-NestedVm.ps1 -OutFile C:\xfer\Enable-NestedVm.ps1
Invoke-WebRequest https://raw.githubusercontent.com/Microsoft/Virtualization-Documentation/master/hyperv-tools/Nested/Get-NestedVirtStatus.ps1 -OutFile C:\xfer\Get-NestedVirtStatus.ps1
Set-VMProcessor -VMName "VMName" -ExposeVirtualizationExtensions $true
https://blogs.technet.microsoft.com/virtualization/2015/10/13/windows-insider-preview-nested-virtualization/
http://www.thomasmaurer.ch/2015/11/nested-virtualization-in-windows-server-2016-and-windows-10/