So like 2 weeks ago I uninstalled splinter cell chaos theory and when it finished uninstalling I was missing like 400 mb worth of space from my hd, so I reinstalled and then uninstalled and it didnt fix the problem. 5 days ago I had 66.3 gb's of memory and today I have 65.6 gb's of memory some how 700 mb's of memory have disappeared without me doing anything, I havent installed or downloaded anything that large. Whats going with my hard disk, and how can I regain my hd space?