WinXP
 

So I'm suppose to install XP on my friends machine with an old XP disc. What the chances it won't work? Besides my install and my step mom's install how many are left on that same key?

Is it better to just buy a new disc?

you can only use one key per machine legally but i'm not really sure what you are asking. you can install XP on the same machine 3 times before it gets denied over the internet. but you can ring up to get it activated no probs.

Thats what I meant...how many times on the same machine. :) Thanks