I had recently bought a Core to Duo machine and installed Windows 2003 on it. I had some hesitation installing Windows 2003 on it as people had said that is has limited support for various hardware.
I picked the Intel DG31PR board as it was the most economical in my limited budget. After installing Windows 2003 and service pack 2 I started installing the video, lan and audio drivers. The video and lan device drivers installed successfully. However the audio driver did not. For some reason it failed.
I Googled a bit and found this nice forum MajorGeeks. I downloaded the latest device driver for my hardware. Yet, I still wasn’t provided the exact answer.
I found another forum and they provided the right solution. They told me to first disable and then uninstall the Microsoft UAA Device for high definition audio bus under the System Devices in the Device Manager and the install the latest driver for my device.
Surely after doing these steps my sound came back.
Hope this helps anyone facing this problem.