Quick question...Do you have Norton Systemworks by any chance? If you do, go to your "Norton Protected" recycle bin, and right click on it. When the menu comes up, click on "empty norton protected files". These are files that have been kept on the hard drive in case you need to unerase something or need to do a restore. Purge all of the protected file and that should clear up a chunk of your HD space. Hope that helps!