Okay, let me start.
6 days ago my C: drive had 114 or so gigabytes free. After 6 days of not using my computer, I came back to do some homework assignment. When I went to "Computer", I had 53.7 gigs free on drive C:. Now bear in mind that I did not use my computer in those 6 days. I would like to know what happened, and if anybody can help.