I am 1 of those people that leaves thier pc on 24/7, after a few days of not using the pc, I will try to watch a video off msn but there is no audio. I still get audio from other normal pc functions, control panel says there is no audio device. When I reboot the pc, everything is back to normal with my ac97 audio device listed. but a few days later with no pc use, it happens again and I need to reboot again. This has just recently started happening in the last couple months. Is there a solution to stop this need to reboot every time I sit down at the pc?