Follow these steps to use the Hardware Driver Reinstaller to install the original audio driver:
Click Start , All Programs, Recovery Manager, and then click Recovery Manager again.
Figure : Recovery Manager
On the Hardware Driver Reinstallation welcome screen, click Next.
Select the audio driver to reinstall, and then click Next.
Figure : Select the driver to reinstall
If the audio driver you want to reinstall is not listed, select The driver is not in the list, and then click Next. Helpful information will advise you how to install drivers using Windows Device Manager. Follow the onscreen instructions.
The Recovery Manager begins reinstalling the driver. After the driver installation is complete, click Finish to restart the computer.
After the computer restarts, test for sound.
If the computer has sound, the issue is resolved.
If the computer still has no sound, proceed to the next Step to reinstall the audio driver.