I have a 40 gig drive on my Toshiba Satellite with XP SP3 installed. It comes up as only 37 gigs so 3 gigs are in the void there but I'm not worried about that because I realize that when they say 40 they mean "almost 40". What I am pissed about is the other 6 gigs that are unaccounted for after I add up the totals from my used and free space. It doesn't add up. I had this problem a long time ago and I forget how I fixed so maybe I never did. 6 gigs is really nothing but until I get a new 320 gigger or more which I can't afford right now, 6 gigs is alot considering what the hell could be taking up 6 gigs that I can't even see? Is Microsoft the culprit? I know there were hidden .dat files in earlier xp releases but I used to be able to remove them but this time I don't know WHAT it is - ?