How do I get computer to turn off automatically after a period of inactivity?

A friend has a computer that turns itself off after a certain period of time of inactivity. And all you have to do is move the mouse a little, and the computer comes back on. Maybe the computer is not completely off, maybe this is called hibernate or standby or something. Is this a good thing to do or should I just let my computer run? How do you get the computer to do this auto shut off thing as I described at the start of this paragraph?

By: John L

About the Author: