A-mak

To ensure no one turns off the computer I would normally do the following. 1. Put a password on my user account and "lock" the computer whenever I leave it by pressing windows key + L. Unless they know your password they will not be able to shut down the computer or close anything opened (sofware wise).. I know they cant on classical login screen, not too sure about the other one. 2. My case has a lock on the front to prevent people from opening it and thus when locked they cannot push the shutdown or restart buttons located on my case. 3. If they arnt that smart as you say.. Then they shouldnt know about the powercord that goes into the back of your powersupplie. If they do, tell them if they pull it out it will damage computer components and to never touch it . Hope this helps. But yes, I too suggest firefox2 it's great.