How to shutdown a Windows machine from command line.

Open command prompt.

1. To simply shutdown type
     shutdown -s

2.  To forcefully shutdown the machine (Close all application forcefully before shutdown)
     shutdown -f -s

3. To restart type
    shutdown -r

4. To forcefully restart the machine (Close all application forcefully before restart)
    shutdown -f -r

5.  To set countdown before shutting down your machine.
   
     shutdown -s -t 60  (60 is value in seconds if you want to shutdown after 1 hour value will be 3600)

6. To shutdown a machine remotely from another computer.

    shutdown -s -m \\computer name or ipaddress (Be sure the machine has permission to shutdown
    remotely.