Whether you are logged in via RDP or group policy has removed the restart option, there are always times you might want to manually restart the computer. We use this on a daily basis.
Restart Computer Remotely
Launch Command Prompt from the start menu by searching CMD and pressing enter.
If you are running metro it will look like this:
In command prompt type the following:
It will take a minute or so and then the computer will restart.
Tip from Z-man
The following command will force the restart with 0 second delay regardless of other processes that might be holding it up.
shutdown -r -t 0 -f