If u are desprate, here is what i recomend: 1) Boot the computer to your Windows XP cd. 2) Select the option "setup windows XP now". 3) Accept the EULA 4) Select the windows XP installation u want to fix fro mthe list, the press the R key. WARNING!!!: If the R key is not an option, you will lose all info on your windows install. 5) After you press the R key, it will act like it is doing a clean install, but dont worry. After u reboot it will continu to install normally. But don't worry, all of your profiles and programs will remain intact. If u had updates to windows, u will need to run windows update.