- Go to C:\Windows\System32
- Find UTILMAN.EXE
- Right click, then Properties
- Safety, Advanced, Permissions (Continue)
- Change the main owner "TrustedInstaller" to "Administrators" (Make sure you are an administrator)
- Add a permission, then click on add a "Principal".
- Enter "Everybody", Check name, then OK
- Change the type to "Deny" and "Full control".
- Click OK, then log back in.
- Run gpedit.msc
- Go to: "Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options".
- Find and enter "Shutdown: Allows you to shut down the system without logging in".
- Deactivate this setting