I recommend using the BIOS to disable the on-board soundcard, when you need to use it again you can re-enable it.
Basically, if you don't know, you just need to press DEL when you first turn the PC on and can see the memory and CPU info. Hunt around in the menus (it may be Advanced options or PCI devices or something) for something like 'On-board sound' and disable it. Reboot and presto, it's gone.
Last edited by powerpleb; 07-03-2008 at 01:45 AM.