I was going to suggest checking your system restore folder. It can get very large. If you have a lot of music and/or video, check how much space that is taking on your drive.
Open up your control panel and go to Add/Remove Programs, and uninstall anything that you don't need.

Originally Posted by
Grinenshire
PS: No, you can't half damage your HDD. Either it's working or it's dead.
It's possible to format the drive with unusable disk space if you give it four primary partitions without using its full capacity. I doubt that's what has happened here though.
