First of all, before you decided to test SP2, you should have make sure there was no spyware, and the two program you mention, Ad-Ware and Norton, is the two in which I would NOT advise in using. I use Spybot, SpySweeper. The reason why you can not do a restore, is that, when it try to back-date, it found a protected file that got mess up, so it will not let you restore to a back-date, due mainly to virus inside one your file. Look inside the regedit for the program that will run when Window boot-up, and disable what you don't want to boot-up, and one thing, ALWAYS do a scan in Safe Mode.