1) Download ArduPilot-Arduino-1.0.3-gcc-4.7.2-windows version (Do not use the latest version)
http://uav.tridgell.net/Arduino472/
2) Extract zip file when download finish.
3) Download the ArduCopter-3.2.1 (Do not use the latest version)
https://github.com/diydrones/ardupilot/tree/ArduCopter-3.2.1
4) Extract the zip file after download finish. File location at /Git/ardupilot
5) Run the Arduino.exe inside ArduPilot-Arduino-1.0.3-windows folder
