Ok, I have this strange problem with my disk drive. When I click on properties on my local drive (c, it indicates that I only have roughly 3 gigs free for storage, but the thing is I'm hardly using over 30 gigs on my 80 gig hard-drive. I went from having over 50 gigs of free space to only 3 in a matter of days, even though I didn't download anything of significant size. Any ideas why this might be happening, and ways to fix this, instead of re-installing windows?