What%u2019s the Difference Between Sleep and Hibernate in Windows? - How-To Geek. What do you never do, in addition to tugging on Superman's cape, and messing around with Jim (apologies to Croce)? Why, poke a stick at a sleeping bear, right? Well, your computer is like that. If you have ever played around with the Power settings or the Start button, you have seen options like "Sleep" or "Hibernate". Sleep is just what it sounds like. The screen goes dark, and the computer just sits there until you wake it up, usually with the space bar, or the power key. Hibernate is a deeper sleep, in which your running programs and data are stored in snapshot form, and, when you come out of hibernation, usually with the power key, the last active state of the computer is restored. It really is that simple. If you are going to be away from the computer to get a cup of coffee, you might want to click the Start key, click the Shut Down key, and click Sleep. If you are going to be away from the computer for a longer time, click Hibernate. Now, go away. I am feeling the need for a nap.