as for this suggestion above, sorry i don't follow
so i should put in the USB stick i used to do the install and then run the above for it? (With the drive letter corresponding)
If you have Windows 10 installed, just go to the start menu and scroll down to Contact Microsoft.
I can categorically state that I was able to transfer my digital licence from an existing VM to a second VM using the troubleshooting mechanism. Was dead easy - I just clicked I have new hardware - it listed old VM, clicked check box, and it just worked.
Really impressed with how easy it was.
This is quite a good article as well.
How to re-activate Windows 10 after a hardware change | Windows Central
type slui 4
The screen should give you a number to call
Just connect the install USB , then run the commands
You have to change my drive letter example, F, to the drive letter of the install USB.
You don't have to run anything, the commands look at the files and report the versions on the USB stick