mjslakeridge :
The Microsoft info you linked to makes no distinction between OEM and retail licences. Is there any distinction anymore as to whether a licence can be reactivated after a hardware change?
Yes, the line between OEM and Retail is very blurred now.
But there is a distinction in exactly where the Win 10 originally came from.
A preinstalled OEM Win 10, like from Dell/HP/etc...can't be transferred to ne hardware.
Any other valid method of getting Win 10 on the system, OEM or not, will work to transfer to new hardware.
For instance...
A previous Win 7 OEM that was Upgraded to Win 10....works
A Win 10 OEM that you bought and installed....works.
A preinstalled Win 10 OEM....apparently does not work.
I saw a matrix chart on this a while ago. Of course I can't find it again...
And of course, MS changes the rules, seemingly at random. Determined by sunspots, maybe.
So it might work with whatever licensing he has.