3yr old laptop with xp home installed by vendor. Went and bought a XP pro disk (legal) oem disk and installed and has been working just fine for the last 3 years. HDD went south, bought a new HDD and reinstalled windowsxp pro from a disk that I slipstreamed sp3 into. Install went fine, however when trying to activate, changed the product key back to the original XP PRo disk version that I bought. MS automated activation says the key does not match after trying the new installation numbers. Tried activation twice no luck. Is there ever a person that answers, all I can get is the automated answer, or is my process wacked out.