Simple command to force RESTART a remote Server. I usually run this command from the domain controller that the server belongs to.
C:\shutdown /t 0 /r /f /m \\192.168.11.200
/t xxx Set the time-out period before shutdown to xxx seconds.
/r Full shutdown and restart the computer.
/f Force running applications to close without forewarning users.
/m Specify the target computer \\ComputerName