Open a command prompt as Administrator and run the following:-
**Replace myserver.mydomain,com with the FQDN of your computer**
SHUTDOWN /r /f /t 0 /m \\myserver.mydomain.com /c “remote logon unresponsive”
/r Shutdown and restart the computer.
/f Force running applications to close without forewarning users.
/t xxx Set the time-out period before shutdown to xxx seconds.
The valid range is 0-600, with a default of 30.
/m \\computer Specify the target computer.
/c “comment” Comment on the reason for the restart or shutdown.