I inserted a movie into a powerpoint presentation, and it works simply by clicking the mouse. However, when I try to use it on another computer, it just doesn't respond. Both computers run on Windows 7 and both have Powerpoint 2003 installed. I can get the movie to play on the second computer by opening Windows Mediaplayer, locating the file and running it from there, so the problem is not that Windows media on the second computer can't run the movie (although that's what it says when I try to run it in Powerpoint on the second computer). It's a puzzle. Any suggestions?