It is possible that your audio file infected by virus too. Try to reinstalling your audio hardware. If you still can not get the sound from your hardware after reinstalling it, try to scan your harddisk in another clean pc. After that try to reinstalling again your audio hardware. But if it is also fail to get the sound,
the best way is to reinstall your system. And don't forget to install good antivirus for your system.
If your hardware have problem in search the correct driver, try RadarSync
. It will scan all of your hardware driver need in the system.