Did it ever work?

Anyway at this point you need your XP CD. Every XP computer has a unique Product Key and should be supplied with an XP CD.

If you were not supplied with a CD along with a Product Key then you should contact the seller of the computer.

Reinstalling XP would be your most expedient solution at this point.

that is how i know about the windows

i have found problems with my registery do you think that a registry repair and clean up disk might work

I think you need an XP CD to reinstall XP.

Whoever sold you this computer should be responsible for supplying you with an XP CD as well as the proper Product Key to use it.