Microsoft UAA Bus Driver for High Definition Audio

Devices this driver supports:
Microsoft UAA Function Driver for High Definition Audio - Adi 1983
Microsoft UAA Function Driver for High Definition Audio - Adi 1986
Microsoft UAA Function Driver for High Definition Audio - CMedia 9880
Microsoft UAA Function Driver for High Definition Audio - Conexant Waikiki
Microsoft UAA Function Driver for High Definition Audio - Realtek 260
Microsoft UAA Function Driver for High Definition Audio - Realtek 261
Microsoft UAA Function Driver for High Definition Audio - Realtek 280
Microsoft UAA Function Driver for High Definition Audio - Realtek 880/860
Microsoft UAA Function Driver for High Definition Audio - Sigmatel 9770
Microsoft UAA Function Driver for High Definition Audio - Sigmatel 9772
Realtek Content Creation Bay
Realtek High Definition Audio

For Windows 2003 too.

Always use the most recent driver version available to work your computer properly. Search the latest drivers for your hardware configuration.Before installing a new driver make a Windows restore point to have a back up in case you install the wrong driver.

If your hardware device is older than the version of the driver is possible to not work,so find the exact match.

Microsoft Windows XP Professional
Microsoft Windows XP Home Edition
Microsoft Windows XP Tablet PC Edition
Microsoft Windows XP
Microsoft Windows 2000