Just installed OpenNI files to my home PC and run few samples. Working pretty good. Below simple instruction how to setup OpenNI for kinect hardware on Windows (i used Windows 7 Pro 64)
1. First uninstall all previous drivers (NUI or libfreenect)
2. Then install drivers from https://github.com/avin2/SensorKinect use manual install from 'PlatformWin32Driver' ,after correct install you will have 'Kinect Motor' and ' 'Kinect Camera' under 'PrimeSensor'