I'm no "expert", but after building a new PC, I installed Win 10 Pro on the C-drive with the license key from my old PC. The new installation does NOT use a "Microsoft account". It uses a "local account". I then installed Hyper_V with Win10 PRO and activated it with ANOTHER KEY, and a Microsoft account and it worked, showing 2 different keys. I then upgraded the Hyper-V system to Win 11 Insider Dev and re-booted the Hyper-V system. Keyfinder still shows 2 different keys. Both systems update properly. So the net is: 1 local device and 1 virtual device, with different keys.