I did look up on google and follow the step for Window 7. Right click to menu list. Click on personalize. Click Screen Saver. Click power option. Scroll down until last part. Click + top open then click on Sharing Media. Click allow to sleep mode. I did finish with that. About hour or so, I can see my computer turn it on itself. How come turn on itself without someone touch my computer? I need find other way to put real sleep mode. Not turn it on itself for no reason.