Is W11 completely free?

[Maximum Triceratops]

Hi,
Strange one, just built another pc, installed W11 home and attempted to put an oldW10 key in but it says that the account is active and all seems just like my other PC that I upgraded from W10? so I never entered any product key at all, it seems like ive just been given if for nothing?

 

[Maximum Triceratops]

Thanks for replies, it must be on some of the hardware I built the pc with i'm assuming. Used a new MS acccount to log in with, a bit baffling but I aint complaining either

 

[Maximum Triceratops]

If you've installed Windows with that motherboard before, that will be why.

Ok yeah possible, however if that's the case then I am running 2 computers on the same licence under 2 different Microsoft accounts.