Here is a cool trick to play a prank on some of your friends. Using this trick you can either Disable Shutdown button from the Start Menu which will make the Turn Off option hidden or re-enable the removed Shutdown option.
One of our readers came across this problem that his Shutdown button was disabled due to some virus, so here are the steps to either enable the option or deliberately disable it.
1. Open the Registry Editor by typing regedit in the Run box.
2. Navigate to the key HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
3. Now on the right side, create a DWORD value with the name NoClose as shown
4. Now double click to give it a value of 0 (if you want to enable the Shutdown button) or 1 (if you want to disable the Shutdown button).
After you restart the computer, your Shutdown option will get removed from the Start Menu and it will also not appear if you hit Alt + F4.