I've recently acquired a roommate. A buddy of mine temporarily moved in with me while his place is being renovated. I've asked him respectfully to stay off my computer when I'm not around because it has work-related documents on it and I want to make sure nothing happens to them. He's not an avid computer user and a lot of times I hear him say "What just happened?" when he's on it. One day I came home from work to find the screen saver disabled. He said he needed to check his bank account quickly and he doesn't know what happened. I've thought about putting a password on it, but that's a hassle for me and I have too many passwords to remember as is. I've heard that I can put a timer on it so it wont turn on when I'm at work. Can I do that, or is it a myth?