Hello, Quick background to explain my situation: My girlfriend has a Dell desktop that has XP Home installed on it but it didn't come with a restore disc. The machine is now 5 years old and out of warranty so getting a disc from Dell is not an option. I have a Windows XP Home SP3 OEM disc but the computer has a key for the original version (no service packs installed) so it will not work with my disc. Is there a way to remove the service packs so that I can reinstall using the original key?