First install:
libusb-win32-filter-bin-0.1.10.1.exe
Then connect your PS3 Sixaxis controller to your PC & press the PS3 button.
Then run ps3sixaxis_en.exe (Everytime you want to use yout PS 3 controller, you have to run this .exe first!!).
Now you can use this great controller at your PC (including the Sixaxis controls!!!!)!!