The things that go on in your machine whilst you sit there unknown to yoeu must be legion. It so happens that after my most recent rebuild, and when XP Pro was loaded it examined the drives available and announced that is taking over 'D' drive. Now 'D' is an external; in a caddy with a 2Gig HDD. The number of times during the day it suddenly wakes up and chatters away, the activty light flashing away says to me that Windoze is up to something- but what? Automatic updates or simply backing up?