Normally to shutdown Windows, you need to go to you Start Menu » Turn Off Computer » Turn Off
I use my keyboard for this purpose by hitting in the shortcut keys, Windows Key followed by U and U.
Carol has a tutorial on getting the same thing done by creating a Windows shortcut.
You can create a Shortcut on your Desktop (read a similar tutorial) with
shutdown -s -t 01
-s issues the shutdown command and the
-t 01 sets the time to one second. You can change the number to something higher if you would like to wait.
Aborting the Shutdown
With one second delay you won’t really be able to abort the shutdown, but if you set the time a bit higher, then you will be able to abort the shutdown by running