I am trying to reboot my computer... my computer all of a suddon is telling me that my windows xp isn't genuine... I have all the cd's for windows... the little bar code on my computer is there... I tried to fix this with windows, but it did not work, so I just want to reinstall my windows xp software...

>Moved from Intros<

If you already have the XP CD then it's a simple case of boot to the CD and follow the prompts.
Best idea is to do a FULL format as this completely wipes the drive.

Remember to back up any data you want and make sure you have all the applications you want to reinstall readily to hand.