Most people have a password-enabled screensaver (at least at work) set to activate after a certain amount of time. Sometimes, however, when you step away from your computer, if you have sensitive information on your screen, you may need to hide and password protect your computer immediately.
This quick fix will do that for Windows 7, XP and Vista.
Just hit the windows key + L and you're all set.
Wellington Florida
Married
I use this at work all the time when I have to step out of my office for a few and don't feel like shutting down my computer.