DO. NOT. INSTALL MOTIONINJOY!
the software is very well known to come packed with malware, overrides most of your other USB/Bluetooth devices and is a major pain to uninstall. avoid it at all costs.
SCP Driver Package is highly recommended. in the event that or Xpadder doesn't work well for you, there's Better DS3, which is based off MotionInJoy, sans advertising & malware.