Been having this issue w/ no sound after computer crashed. Computer had a soundblaster live card installed. At first inspection of device manager, the card was not detected by windows. I shutdown, physically uninstalled card, rebooted, then shut down again, physically reinstalled card in diff pci slot, rebooted and the new hardware was detected. I reinstalled the drivers from the creative website. To my suprise, still no sound. There were no yellow icons in the device manager, showed soundblaster was working properly. Soundblaster was the default device for all audio in the control panel. I set the bios to disable the on-board audio controller, still no change. I figured the sound card was bad. I uninstalled all drivers and physically removed the card. Enabled the on-board sound, reinstalled the drivers for the motherboard, the on-board device is the default now in control panel,I now have a constant noise coming from the speakers that only goes away when i hit the mute button, but still no actual playback. I have no idea what the problem is, usually updating the drivers has fixed this problem before.