In the event is unable to automatically revert security settings on your Windows device, you can run a program manually to revert all settings and restore your computer to initial state. This fix can resolve issues, including missing buttons, missing splash screen, or replaced background wallpaper.
To revert your settings, when you have access to your desktop:
Navigate to C:\Program Files (x86)\\\Services in the file explorer, as seen below:
Locate the application named '
Click Run as an Administrator
This will run a script that reverts the security settings imposed by back to your computer's default settings.