to refresh XP and Vista (Home page). Well, I got as far as 'Defrag the prefetch file' and that really blew my computer's mind. It chuntered away for a couple of hours, then froze with the HDD light on.
A forced shutdown and restart didn't fare much better, and it took two System Restores to get it running again. All this time a Spyware program kept asking me to allow or deny Registry changes.