Today i was running in to a problem when starting powerpoint, it appears to open off the screen (probally an issue because of the use of external monitors at work). The Powerpoint icon appears on the taskbar, and when I click it a window appears to fly off the right-hand side of the screen. When I click again I saw the same window fly back to the task bar.
Press Alt+Spacebar then M. Now you can move the window around with the arrow keys (on your keyboard).
Once it’s “dragged” back where you want it, or at least has the title bar on screen so you can grab it with the mouse and press ESC or you Maximize the application.