Presentation going off screen

Hi all, I'd appreciate any help.

At first I was having problems running powerpoint. The program would run and it would show up in the task bar, but not on the screen. If you tried to minimize and maximize it, you could see it moving away from the screen and off to the sides where it can't be reached. I can run the presentation and hear the sound effects and everything, but not see it.

I managed to get the application back on the desktop by right clicking on the powerpoint tab in the taskbar and choosing move. But the full screen presentation still can't be seen when I run it.

Anyone know how I can fix this?