It happens… Sometimes you like a song and you take the mouse from the desk and click on the media player to increase volume… And then play that window with mouse pointer… like you’re dancing with the song!!
Just now I was doing the same and I came to know a very good feature of Windows 7.
If you want to minimize all windows but the current… then click the one you want to retain and shake it right-left or up-down in any way. And all windows will be minimized but the current. The same thing works to restore all the windows. Shake it again and here you go! All windows are back in their original state.