To Sleep, Restart, or Shut down Windows 8 follow the below steps.
- Move the mouse to the TOP-RIGHT corner of the screen or press the Windows key + C to open the Charms.
- In the Charms menu click Settings.
- Click the Power icon and select either Sleep, Shut down or Restart.
Tip: If the above steps seem like too much work you can create a shutdown, restart, or hibernate shortcut that will allow you to perform any of these tasks faster.