Sound Problem

When I play my MP3, it often crash when its playing after 30-60 mins. Thinking this was Winamp problem, it also crash when I play media files such as avi, mpeg, or whatever I play for sometime. First the sound would cut out than the computer would freeze. There's no way to end the task or program. When I'm lucking enough to end the task I still am not able to replay the file at all. So far this has happened with Sonique, Winamp, Windows Media, and even playing Command & Conquer Generals for some time. In order to get the sound to work again, I would have to do a hard reset. Can anyone think of any idea why this would be happening?