Get the BIOS GUID of a Hyper-V VM

I’ve just spent the last few hours looking into how I can get the BIOS GUID from a Hyper-V VM from inside the Host OS. I needed this so I could use it to pre-stage devices in Windows Deployment Services. I could have used the MAC address of course, but I decided I wanted to use the BIOS GUID instead.

So after a fair bit of hunting all I could turn up was an older VBS script. I decided this wasn’t ideal and so went about investigating how I might do this in PowerShell (this is a PowerShell blog mainly after all). Well after a few minutes I came up with this (rather long) command:

It uses WMI/CIM, but does seem to work nicely (don’t forget to set the name of the VM):

Good night!