Vista Mystery

I have SCSI card for which Adaptec posted Vista drivers soon after Vista was
released.
For several months the drivers would never install. Vista would not
recognize them as Vista drivers.
One day out of boredom I tried installing the drivers again from the same
file where they have been sitting since day one with no changes.
Voila, the SCSI card was recognized and has worked ever since.
Perhaps Microsoft is actually sneaking usability fixes into Vista.
They still have a ways to go.