I was going to download and install that service pack 3 for xp aswell but after reading negative reviews about it, I decided to stick with service pack 2 instead. If you can't get your equipment to work, then you may have the only option of uninstalling sp3 and reinstalling sp2, which is still available to download. Do you have Windows XP on cd or on a disc partition? I would reinstall the main operating system first, then service pack 2 and see if that fixes the problem. Just remember to copy all your important files off the computer first and onto either an external hard disk or blank cd's or dvd's.