I have the same CD version of XP home on mine and both my daughters' PCs. Mine and one of their PCs shows it as roughly 1.5g windows folder. My other daughters PC has it as roughyl 4.5g. This is a small 6.4g HDD that originally had win2K on it.........but when putting XP on, reformatted in NFTS format and deleted all partitions to keep it as one disk. I have looked and cannot find what is taking all this room, take 2/3 of the HDD........doesn't seem right to me. Any suggestions as to what to look for?? I only installed the mobo drivers and sound drivers........nothing out of the ordinary. Showed this way twice..........tried a reinstall after finding this size the first time.......I am baffled.