Method 2 – PC Settings --Windows 8 System Recovery Options

The second way to do it is to go to PC Settings in Windows 8. You can do that by opening the Charms bar and then clicking on Settings.

Then click on Change PC Settings at the bottom of the settings bar:

Finally, click on General and then click on Restart now under the Advanced startup section.

"Method 2 – PC Settings --Windows 8 System Recovery Options"

Reference : online-tech-tips.com