hi friend,
You may have
un installed the driver i'm guessing. If that so, you need to reinstall the drive.
1. Start
2. Click on "search"
3. Click on "For Files or Folders"
4. Type in "Recovery Manager" in the search bar on the right (it'll bring up the "Recovery Manager" folder and others
5 Click on the "Recovery Manager (shortcut) not the folder
6.The next window would say "Welcome to the Recovery Manager"
7. Click on "Advance Options"
8. Select "Hardware Re-Installation"
9 Click Next (this will bring up the "select a driver to reinstall'
It's a free download @ http://http://www.brothersoft.com/realtek-ac97-audio-driver-65159.html
or @ http://drivers.softpedia.com/...
hope this helps u
thank u for using fixya
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regards
sivaranjini