If you are not hearing any audio at all from your computer, click Start >
type Device Manager > open it > expand your 'Sound, video and game
controllers' from the devices tree, select your Audio device, right click it
from the contextual menu that appears, click 'Scan for hardware changes', if
it does find any problems and your audio is still not working, from that
same contextual menu, click the 'Update Driver software...'.
This should check for any new available drivers for the device that might
resolve your issue. You could also try uninstalling the device, restart the
system, let Windows redetect it and reinstall the driver.
Have you tried doing a system restore to an earlier point before the problem
happened?
