Sorry to say you will have to do a clean install which will wipe out all information on your hard drive. To do this you need to get into your setup screen which is usually can be done with the f2 key or whatever key you use to get into setup. Once there go to the boot screen un check everything except your cd drive. Put in your original Windows xp disk in yur cd drive and press ok. Then reboot your computer. Follow the directions. Once this is done go back to your setup screen and recheck your c: drive first then any other drive you may have.
