There annoying me! Every time the sound from my headphones just turns off. I try to adjust the headphone jack which goes into my PC but still it doesn't work! When sound turns off on a video that I'm watching on a web browser, sound works perfectly when I open a media file. This also annoys me when playing PC games, I have to close the game ( because new games don't allow you to use Ctrl+alt+del normally) open a media file, then play normally. I'm starting to think this is a hardware problem, because the headphones work perfectly on my laptop and netbook. I think I should take apart my PC and look for problems there. But maybe I shouldn't go through that, any suggestion's what may cause this problem?