Change Sleep Time on Windows 8
When you finished windows 8 installation, the default sleep time is 30 minutes, most time we do not want the computer to sleep so earlier. OK, we change sleep time now.
1. Open Power Options
Right Click the Window icon in the left-bottom corner. Select control panel from the pop-up menu.
Then click Control Panel > Hardware and Sound > Power Options
2. Change Sleep Time
Click Change plan settings
Select a proper value in the options, Turn off the display means if your windows is inactive for 3 minutes, windows will turn off the display, if there are mouse moving or keyboard even before computer sleeping. display will be turn on immediately.
If you dont want computer to sleep, select never in the options.
Click Save changes when you finished the changes.