Do I need the retail version of Windows 10 to run in a virtual machine?

[Cromulent]

I already have a copy of Windows 10 Pro which I use in a virtual machine, but I need another Windows 10 virtual machine. Would I be OK to use an OEM version of Windows 10 or do I need to have the retail version?

 

[Cromulent]

What's the reason? As you probably be better off using the trial versions in a VM.

Game programming for one virtual machine and FPGA programming for another. Both need to run Windows 10 Pro.

You can use any version. You can even use the same Win10Pro disk that served your first VM, if you wish.

Ah, cool. Thanks.