Instructions
Go to MotionInJoy.com, and download the MotionInJoy DualShock 3 driver. Depending on your operating system, you must download either the 32-bit or the 64-bit version of this driver.
Double-click the downloaded ZIP file to open it. Next, double-click the file inside.
Click "Next," and then click "Finish" to launch the MotionInJoy Gamepad Tool.
Connect your PS3 DualShock 3 controller using the USB cable that came with it.
Click the tab labeled "Driver Manager" on the MotionInJoy Gamepad Tool. Next, click "Load Driver," and then click "Install this Driver Software Anyway." You will see a "SUCCESS: Install Completed" after installing the driver. Your computer now recognizes your PS3 DualShock 3 controller.