How to shutdown your System remotely?
“SHUTCMD.EXE†utility that you can use to shutdown or restart your local or remote computer. You must first logon to the computer that you're trying to reboot.
You can shutdown the local computer by running this command:
SHUTCMD /L
To shutdown a computer on your network ("SERVER" the name of the computer you want to shutdown):
SHUTCMD \\SERVER /Y
To shutdown a remote computer connected to the Internet ("131.200.1.1" being the IP address of that computer you want to shutdown).
SHUTCMD \\131.200.1.1 /Y