Instructions
Download the driver from the link in the References section and save it onto your computer's desktop.
Unpack the file ps3sixaxis_en.exe from the .rar file using a .rar expander and save it onto your desktop. See the Resources section for a free option.
Plug your PS3 controller into the computer using the USB data cable.
Run the file ps3sixaxis_en.exe on the computer by double clicking on the file. Press the "Connect" button on the controller if the computer doesn't detect it.