I cant use my fujitsu lifebook p1120 because i need to reinstall windows xp and i do not have the product key help please.

Hi there,

There should be a sticker on your laptop that has the product key on it. It is a 25 character key in 5 key sections separated by dashes. If this sticker is not on your laptop for some reason, there are applications that can help you find out what your key is. I use Magical Jelly Bean and it can be found at this link:

http://www.magicaljellybean.com/keyfinder/

Have a try with it and let me know if it works for you or not. Any questions leave a comment!