Click the Start button (Windows logo), right-click Computer , and select Manage .
Click Next > Install the hardware that I manually select from a list (Advanced) > Next.
Scroll down and select Sound, video and game controllers > Next. how to install sound drivers in windows 7
After reboot, Windows 7 will automatically detect the missing hardware and attempt to reinstall the driver using its built-in cache. If it installs the generic "High Definition Audio Device," follow Method 2 or 3 to get the real driver. Method 5: The Legacy Hardware Wizard (For Old or Unusual Cards) Some vintage sound cards (Sound Blaster Live!, Audigy, older C-Media chips) need this method.
In the confirmation dialog, check the box that says "Delete the driver software for this device" (if available). Click Uninstall . Click the Start button (Windows logo), right-click Computer
Restart your PC immediately. Do not skip this step.
In Device Manager, right-click the problematic audio device and select Properties . After reboot, Windows 7 will automatically detect the
Open Device Manager (as above).