Rlyss

I think you should try <a href="http://www.ccleaner.com/">Crap Cleaner</a>. Don't worry, it's not malicious, it's legitimate and it's safe. It'll delete all the temporary crap and save you a lot of space. You can choose what you want to be cleaned and it won't delete anything important. I think if you run that you'll be able to recover a lot of space and then be able to defrag.