Thanks guys for the help. I really appreciate it!!!
Geek:Yes, I have looked at the Intel page "Intel® Desktop Board D875PBZ". The "latest drivers" link does not list audio drivers.
Admin:The computer is an MPC Clientpro.
Model: D875PBZ-0DYD
Serial#: 3657702-0001
I've tried downloading and installing both the RealTek and Via AC'97 drivers. The RealTek drivers crash Windows (even old versions -- the oldest I've tried is 3.64. The newest I've tried is 4.06). The Via drivers don't work with the hardware.