Thank you for making the distinction that there is no MS RAID driver that is part of Windows, and that it is actually a pre-packaged Intel driver that is allowing Windows to install to Intel RAID systems in RAID mode since Vista.
But I don't know how this affects my original assertion that you can't undo an RST install (if you are in RAID mode). For instance, I installed a 12.X RST package, and was then unable to get rid of it, so I could go back to a 11.X package.
