Hi! This is my first post so please bear with my question

I have a big problem with my laptop. It is running on windows 8.1. The 'shutting down' and 'shut down anyway' screens somewhat turned like windows 2000 shutdown style.

It has windows that have 'end now' and 'cancel' options. I don't know what I did. It just happened one time i shut down my laptop. Can it be a registry problem? Or if not, is there any way I can revert it back to the default shutting down screen? Advnance thanks.