I replaced an old logitech keyboard and mouse with the marvellous MS Keys S Combo and deleted the old drivers from device manager. On restart, two keyboards show up in the initial bios screen and they are back in device manager with a note that they had been deleted. Google only advises what I did or an approach that would stop any microsoft drivers being retrieved, which is too drastic. I only want those particular ones not replaced. It appears unable to distinguish between the old and new drivers which are probably the same but I don't need two. Hardly an important detail but I would like to understand why it is happening.