The guest operating system "windowsHyperVGuest" is not supported

[WTJ]

I got this error "The guest operating system "windowsHyperVGuest" is not supported" when I powered on a VM installed W2K12R2 and Hyper-V. Please tell me how to resolve it.

[RvdNieuwendijk]

You need at least vSphere 5.5 for the windowsHyperVGuest guest OS identifier. The blog post https://www.derekseaman.com/2014/06/nesting-hyper-v-2012-r2-esxi-5-5.html gives some tips for running nested Hyper-V. Hopefully, you can it working with these tips.

[WTJ]

Thanks for your help. The version of vSphere is 6.0. I still got the error after trying these tips in the blog.

[bluefirestorm]

Assuming your processor is Intel, does it support Extended Page Tables (EPT)? Not all Intel processors support EPT even though they support Intel VT-x such as the older Xeons or some of the pre-Skylake unlocked K processors.

[WTJ]

Thanks for your help. The processor type is Intel Xeon E3-1290 v2. and it supports EPT.

[bluefirestorm]

I suppose you must have seen this, too.

Running Nested VMs

It mentions a checkbox "Expose hardware-assisted virtualization to the guest operating system." for the processor settings.

This might be the GUI equivalent of the vhv.enabled = "TRUE" in the vmx.

Depending on the editor you use to add the lines in the vmx, the double quotes sometimes becomes a problem especially if you copy and paste from the webpage; and it basically makes the parameters add in the vmx to be ignored.

[WTJ]

Thanks for your patience and help.

It works when I changed the setting from Other to Windows in General Options as attached.