Introduction

Shutting down Windows used to be simple; just click the Start button and then choose the Shutdown option. Since there is no Start Menu, this command actually pins a tile to the Metro Interface. Windows 8 is an entirely different experience than previous versions of Windows. The users who are new to Windows 8 may not know how to shut it down or restart the system. Basically, In Windows 8 there are three ways to restart or shut down your system.

OPTION 1

Step 1
Whether you are on the Metro UI or desktop, move the mouse cursor to the right side until the search and settings menu bar (called Charms Bar) appears then click on the Setting icon:
charms-bar-in-windows8.gif
Step 2
A Pane will open on the right side that contains the option Power; select it and then choose the option Shut Down or Restart.
start-window-in-windows8.gif

OPTION 2

Step 1
Hold the Windows key and Press I.
windows-key-in-windows8.gif
Step 2
A pane will open on the right the side that contains the option Power; select it and then choose the option Shut Down or Restart.
setting-search-in-windows8.gif

OPTION 3

Another option is to type "Shut down" from the home screen. A search screen will open then from there you can select Settings > Change the power state of your PC > Power.
select-shut-down-in-windows8.gif

Summary

In this way, we can shut down or restart our PC in Windows 8.