Reply To: Kepboard Technology Home › Forums › Professional Resources › Kepboard Technology › Reply To: Kepboard Technology March 19, 2012 at 6:51 pm #21322 brlbyrussellParticipant I add a USB keyboard (Microsoft comfort 4000) with the MS drivers. You may need to call HP or other supplier sales support and ask if they can guarantee nth key rollover for their keyboard. Anyone else have a solution?