I have an Adaptec SCSI card for which there have been posted drivers since
Vista was launched.
For months Vista would not recognize the driver no matter what I did.
Microsoft has arcance procedures for resetting permissions: a waste of time
(so is Vista but that is another rant).
One day, just for the masochistic thrill of it, I tried reinstalling the
driver. Miraculously it has worked ever since and the SCSI card and its
attached devices are recognized by Vista.
Perhaps the Microsoft Driver Fairy will spread pixie dust on your
motherboard one day if you are very good and say nothing bad about Vista.