well now I have complete disabled the onboard audio within the bios, and tried reinstalling vista again, and after install all drivers (minus audio drivers) there is still that unknown device. I think its releated to ACPI because when I open up the system information under catalyst, and select "problem devices" it says "ACPI\PNP0700\4&CB4DC81&0" How come I am having trouble with this all of a sudden, i'm pretty sure that when I first installed vista everything was good and i have no unknown devices. Is anyone else having this problem?