Shutdown Your Computer via Command Prompt

 Steps 
1) GO TO Run (Press CTRL+R)
2) Enter CMD and press Enter.

Shutdown Local Machine (Your Computer)
Type "shutdown -s" without the quotes in the command prompt and press Enter

Restart your Local Computer 
Type "shutdown -r" in the command prompt and press Enter.

Log Off the Current User
Type "shutdown -l" in the command prompt and press Enter.

Shutdown your or a remote computer after a specific time
Type "shutdown -s -t 60" to shutdown your computer after 60 seconds.

Display a Message containing the reason for shutdown
Type shutdown -s  -t 500 -c "I am tired. I don't want to work anymore." (with the quotes) in the Command Prompt and press Enter.

Stop a System Shutdown
Type "shutdown -a" and press Enter..