DeepFreeze. I've been thinking of installing this on several of my family member's computers to save me the trouble of having to go over and fix thier computer every time they decide to "clean out the HDD" or whatever other crazy things they decide to do. My college has this program running on all of its computers, and it basically restores the system after every reboot (ie you can mess with the registry, install programs, delete critical files, but when you reboot the system restores itself). Since they charge ~$40 per seat I wanted to see if anyone here has had experience with DeepFreeze or any similar programs before I buy it. I was trying to find the admins at my school but they never seem to be around when I am, so I decided to post here.