How to Make a Shutdown Timer

Step 1.

Right Click on your desktop and choose "New->Shortcut".

Step 2.

In the box that says "Type the location of the shortcut", type in shutdown -s -t 3600 and click next.

Note: 3600 are the amount of seconds before your computer shuts down. So, 60secs*60mins=3600secs.

Step 3.

Make up a name for the shortcut and you're done.
You can change the icon by right clicking->properities->change icon-> browse.

More Info:
To make an abort key to stop the shutdown timer just create another shortcut and make the "location of the shortcut" to shutdown -a