popatim :
...Doesnt matter my friend. All versions of win8 are transferrable to new systems for a change so he will be 'legal' using the key he has.
🙂
Actually, it does matter a little.
Preinstalled - the path to installing on different hardware is much more difficult.
The licensing agreement from MS specifically asks about 'how did you obtain this? Preinstalled or no'. The terms are different.
Something you bought and installed? Change away!