I have a guest coming to stay in one month. A good friend of course but nevertheless, they may not use my computer. No one may use it. I don't think they have a laptop...but anyway.. If they want to check email they'll have to do it with my supervision.
I have all my banking and business on here as well as other private things. Is there a way to lock it when I am out and they are here? I have XP. I've heard about passcoding the screen.