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Spy on Windows: Closing Time can close hidden windows as well as windows that don't have title bar. What you need is the window/s Text. Here you can find few suggestions of programs that will tell you every window text.
About Closing Time:
Closing Time is a simple little program you can use to close open windows - My computer windows only, all open windows or specific windows. Just right-click on a folder or drive and select 'Closing Time' to do the deed.