Always prompted to update NVIDIA RAID Drivers

My boot partition is RAID 5 array on Gigabyte MB with NVIDIA 590 SLI chipset.
OS is Vista Home Premium 64-bit.
Everytime I boot computer it says Windows has detected new hardware and
tries to install new RAID drivers that computer found via Windows Update.
This hgas been happening for six weeks.

I am given three choices by Vista prompt. I can install drivers, wait til
next bootup or don't install. If I select don't install or install, either
choice will result in installation program trying to run. Any attempt at
installing driver whether from NVIDIA, Windows Update or MB site will fail. I
get BSOD upon reboot. Only Last Know Good will get machine running again.
Manually selecting update of drivers also fails.

I think the issue is that drivers are in use and therefore can't be updated.

I tried booting off Vista DVD and Repairing but it won't overwrite existing
drivers with updated ones. It finds no errors.

I would like to make the driver update prompt go away. Is there Registry
hack to stop this message for my RAID driver without killing hardware detect
or a method to successfully update the driver that will cause prompts to stop.