Java around the world

Hi, thanks for looking into this. Today I wanted to play an old favorite of mine: Battlefield 2. So I installed it onto my computer, an Acer Aspire M5630 with Windows Vista Home Premium on it, and it ran rather smoothly. I ran the game, no problems, then found a server, joined, and I was feeling rather nostalgic for around... 9-10 minutes before all of a sudden my computer powers down and shuts off completly? I assume the problem is with Vista as the moniter did not go black imediatly, but rather faded to black, like Vista does. Beyond this, I have no idea what wrong, and this is quite annoying (I have ran the program multiple times now with the same result). ANY INSIGHT AT ALL WILL HELP ME! I thank you for taking the time to read this, and please offer anything you can share =) Thanks again! No, it is not overheating, it is most deffently a problem with the software.