In the original post “I stated I have downloaded the driver software from the Casio website, and it still does not recognizing it.” It appears this method is not the solution to my problem. I just want my Casio CTK-720 to work like it did before. All i did was plug it in through the usb port, and my cpu instantly connected. Now, it’s as if there is an error which does not allow everything to work properly. Any quality help is very appreciated.