Wouldn't it be convenient if there was a shutdown button on the Start Screen similar to previous versions of Windows? I was determined to bring back this functionality and it is much easier than you can imagine thanks to the flexibility of the Start Screen in Windows 8 and 8.1.
First, right-click on your Desktop and select New and then Shortcut.
In the location box type in shutdown -s -t 0 optionally you can add -f to force the shutdown. Then click next.
Type in a name for your shortcut and click Finish.
Now let’s customize icon for the shortcut. Right-click on the new shortcut on your Desktop and select Properties. Click the Change Icon… button on the Shortcut tab. Select a new icon in the browser and click OK.
Your new icon will be displayed on the shortcut properties window. Click OK to finish.
Finally, let’s pin your new shortcut to the Start Screen. Right click on your shortcut and select Pin to Start. A tile for the shortcut will be created and added to the far right side of your Start Screen. You can then drag the tile anywhere you want it to be placed on your Start Screen.