Dealing with dual monitors sometimes leave some programs on the secondary window. One of the utilities that I use daily for all of my BizTalk development is DebugView.
Since I constantly move from dual monitors (dock station) to a single monitor (laptop display), sometimes I forget to close the DebugView program on my primary monitor. Of course, this means that when I am demo something, I can't get to my DebugView program. It is really frustrating at times, since once you close the application, it saves the coordinates of where the application was last open. arghhhh.... I wish there was an option to turn this off.
Anyways, if you can't find your DebugView on your main window, open the regedit command and go to this hive:
and remove the Settings entry.
Now start DebugView, and it will be back to the center of the screen.