If the Power Options button has gone missing on your Windows 8.1 Start Screen, then this registry tweak will ensure that you get it back.

Learn how to remove Shutdown, Power button from Windows 11/10 Login Screen, Start Menu, WinX Menu, CTRL+ALT+DEL screen, Alt+F4 Shut Down menu using GPO & Regedit.

If you're missing the shutdown button and don't want to use the new charms bar you can add back your shutdown button the start menu manually.