Audio in fully working PC with XP – SP2 stopped working after the automatic update of SP3.

PC was with a Core 2 Duo with Intel Motherboard DG31PR with onboard realtek audio.

Reinstalling Universal Audio Architecture (UAA) High Definition Audio class driver version 1.0a available for Windows XP, Windows Server 2003, and Windows 2000 – KB888111 or the realtek driver from the CD work.

The workaround was as :

  • Edit the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Windows
  • Find the CSDVersion.
    It will be 100 (hex) for Service Pack 1
    It will be 200 (hex) for Service Pack 2
    It will be 300 (hex) for Service Pack 3
  • Change the CSDVersion key from 300 to 200 and reboot the PC.
    Now the System Properties will show as Service Pack 2
  • Install the Realtek Drivers from the CD
  • If it fails install the kb888111 (Microsoft UAA Patch) from Microsoft. Then install the drivers. Test the Audio.
  • Finally change the CSDVersion back to 300.
  • Restart.