Originally Posted by PunterCam

I dunno if this is true, it's just jumped into my head, but I'm sure I have a vague memory...

Have you tried turning the onboard sound back on in the BIOS, but then select the other card as the one to use in windows? I used to experience wierd problems like this back in the days of the pentium 1&2, it's the sortof thing I'd try, even though it makes no sense!