>>Did you empty the recyling bin? Most all files go there and stay there untill you empty the recycling bin. It can be found on the desktop.
>>Technically, when you "delete" something completely, it still exists. On your HardDrive exists a array called the file allocation tabel that defines which "blocks" of data are used and which are ok to write to. This array imforms the computer not to write over the blocks that are labeled "in use" Data cannot be "deleted" from the harddrive, only written over. When you delete something you're just deleting it from the file allocation tabel,letting the computer know thoes blocks are ok to write over. Sooner or later thoes block will be reused. However, it shouldn't matter. When you view the properties of your harddrive, it reads the allocation tabels, so it should still show the extra space you made. I dunno, prob. more then you wanted to know. The only way to ensure that no "interesting" data is on the harddrive is to format it (if that's your case).
>>P.S. DON'T use windows XP. Windows XP is simply windows 2000 for dummies. If you know how to operate a computer, you do not need XP and all its wizards. Plus, Windows XP has huge security holes because of its "remote access" crap.
Be smart and run Windows 2000 Pro! (be sure to upgrade to service pack 2 though, which is found at windows update)