You can prevent users from being able to shut down the computer. This might be useful in cases such as when you’re running a server and you don’t want anyone to shut it down inadvertently.
Navigate to :
HCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
And to:
HLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
In these locations, create or modify the DWORD value called NoClose and set it to 1. Reset it to 0 to enable shutting down.
Log out and log back in, or restart Windows, for the change to take effect.
