i bought a pc from a flea market and it has windows xp home on it but i want xp pro.i have a xp pro install disk that is for a refurbished pc it came with my other pc i bought and it is a refurbished pc and thats how i got the disk.my question is will the product key on my refurbished pc work on my pc i got from the flea market since it is the same disk.or am i missing something.