I have windows xp and 4 gigs of memory. It only shows it having 2 gigs. It shows the 4 gigs in the task manager but when I look at properties of the computer *and other programs* it shows 2. I know that it is a windows xp thing but my question is, Is it using my 4 gigs and windows xp just doesn't show or is it only using 2? When I move the memory sticks around I can get it showing 3 gigs heh.