I'm also having issues getting into the BIOS with the keyboard on the BIOS setting. I always have to use my old keyboard if I want to make BIOS changes.
Update: Seems that McAfee Total Protection 2015 has something to do with it. My machine booted fine until the keyboard initialized the driver, did the firmware update and rebooted. If I totally remove McAfee Total Protection it boots fine, no more 2 minute boot times from Welcome screen to desktop. Once I reinstall it, I come back to having the same slow boot times. I checked my event logs and it looks like something is stopping the McAfee services, I'm not sure what is stopping them though. This would explain the slow down. If I can pinpoint what service is stopping the McAfee services then maybe I can prevent to slow boot times. To simply remove my firewall and antivirus to use a keyboard is not an answer. Any ideas?