My 12 year old son likes to believe he is tech savvy, unfortunately, like most pre-teen middle schoolers he's not aware of the things he doesn't know. He loves playing online games, watching YouTube videos, and Skyping with friends. All of that is fine, he's a good kid and can be trusted as much as any 12 year old can be. However, over the last several months he has started to download various games and other applications to our desktop. Before this we never had issues with the computer, now we seem to have minor problems once a week, for example the computer will not shut down at night. The grey shut down screen will appear and that bluish circle with move, but it will not shut down. This has happened several times. Once, the printer would not print, not sure why, but it is just another thing in the list of small little problems we've had and I've solved.
I'm worried that he's going to do something that will permanently hurt the hard drive, making it so that I loose all or most of the files I have stored on it. I do back up everything, but I still don't want him to destroy the main hard drive. What can I do so that he is still able to get on, play his games, download his applications, and Skype with his friends, but not be able to wipe out my important files?