The following codes are usually typed in command prompt or run window

These are the arguments or option for shutdown
-i Display GUI interface, must be the first option
-l Log off (cannot be used with -m option)
-s Shutdown the computer
-r Shutdown and restart the computer
-a Abort a system shutdown
-m \\computer name (remote computer to shutdown, restart or abort)
-t xx Set timeout for shutdown to xx seconds
-c "comment" Shutdown comment (maximum of 127 characters)
-f Force running applications to close without warning
-d [u][p]:xx:yy The reason code for the shutdown
u is the user code
p is the planned shutdown code
xx is the major reason code (positive integer less than 256)
yy is the minor reason code (positive integer less than 65536)

Example of usage:
shutdown -r (means restart the computer)
shutdown -r -f (means force restart the computer and close running application without warning)
shutdown -s -t 10 (means 10 second countdown before shutdown)
shutdown -a (means abort shutdown) you can't abort a shutdown if it is not counting down or without a countdown.
These are some codes that i use to shutdown or log off or restart my computer.

Code for shutdown
shutdown -s -t 10 -c "Shutting down in 10 seconds"
The output should be like these picture =>

Code for restart
shutdown -r -t 10 -c "Restarting in 10 seconds"

Code for log off
shutdown -l -t 10 -c "logging off in 10 seconds"

Just try to mix these codes and experiment. Do some combination of the codes. Don't worry its harmless
You can change the timeout shutdown to 1 second or 5 seconds if you don't want to wait for a longer time.

I don't use some of the codes stated above like -i, -m, and -d but sometimes i use -f and -a. I use -a if i accidentally click the shutdown shortcut.

To create a shortcut for shutdown, restart and log off on your desktop,

1. Right-click on the desktop then select New then click Shortcut.

The create shortcut wizard should appear.

2. In the text box asking for the location of the shortcut, type "Shutdown" (without the quotes) followed by the arguments or options just like stated above.

3. Click next then input the name of the shortcut in the text box and click finish.

You may change the icon of the shortcut you made.

Just rightclick on the shortcut icon and click properties. Click icon button and select the icon you want.
Enjoy...