The one driver I still can't find is for the coprocessor. First off, why is it needed? What does it do? Where do I find it?
Try right clicking in Device Manager and clicking "Update Driver Software" for the coprocessor. I believe that is due to your chipset drivers, which you could theoretically install from the Boot Camp 4.x package in the "Intel" folder. In regards to the keyboard, I recommend that you manually reload the Boot Camp 4 keyboard driver manually.