My subject basically describes the issue I'm having. When I first got the computer I set the Acer Video Player as my default player because I've had issues with Windows Video Player not working. The Acer player seemed to be able to handle just about any file format with video. Now suddenly when I'm trying to watch footage (typically m4v or mp4 files) it will unexpectedly just stop playing the footage. Often it happens about one minute in to playing a video. It will stop and you have to restart it and it continues on to the point that it is basically worthless to even try. How can I fix this issue? Why did it happen to begin with? It worked great for two months. Thanks.