Also remember..your onboard IGP is useing your system memory...so if you don't have much..then you'll run into issues.
I think integrated graphics adapters manufactured within that period had their own RAM onboard, but I could be wrong. I had an old integrated ATI 3D Rage II+DVD with 2 MBs of its own SGRAM on an Intel AN430TX motherboard.
As recommended, try the above driver updates and mention the name of the sound card. If it still doesn't work afterwards, either it's a software problem or you may have it sharing an IRQ with another device and it *may* be conflicting with it.