Does anyone know how to fix it to communicate between a computer and an Arduino?
check it out the video problem with serial port Arduino uno on Window 8.1 - YouTube
I am not used to new Window 8.1 installing new Arduino. I totally forget how to using it. It was not same as Window 7. not too much difference. I am wondering anyone willing to help it out and i will very appreciated so much. I cant wait to get started! please thanks.
the solved was