Dont most companies use faronics deep freeze (more on that here) i kno i said i use windows one care beta but if it wasent for you having to partision the drive i would think most people would agree faronics deep freeze would be the best. Theres no updateing needed, you just set it and forget it, it protects agenst... everything!, viruses, spyware, mailware, hackers, even protects your windows regestry. The word protects isnt the right word, what it does when you restart your computer it restores all the settings right down to the last bite. Another one made by faronics is anti excutable but i dont think it works as well as they say (more on that here)