OK, I've been gone for 6 weeks.....Mr. 'said' he kept the computer cleaned up, but it wouldn't do scan and defrag for him. Now, it won't do it for me.....I have exited everything in the System Tray except sound icon, Norton and Adujust Display option icons. Damn thing keeps saying "Windows or some other program is writing to this disc. Scan has restarted 10 times...etc." What on earth could be writing to the drive? I really need to clean this thing up. Thanks!