I've had a similar problem, but a bit stranger. About a week ago, I installed a game and everything had been going well. Just a couple days ago though, the sound on my computer speakers won't work. They are plugged in correctly and everything, I even tried them on another pc and they work fine. When I go on Start > Control Panel > Sounds, Speech and Audio Devices > Sounds and Audio Devices Properties ... It says: No Audio Device. After clicking on the Audio Tab, it shows that my default device is: "Modem #0 Line Playback". The other device is: "SB Live! wave device". The SB Live device comes up correctly, but still no sound. And I know that the Modem #0 device is suppose to be the correct device for the speakers. Now, the strange thing about this is, the video game that I had installed has sound. But it is the only game that has it, and nothing else on the computer has sound. Please help, thanks.