Controller Issues (Updated)

[N64Fan3000@11theTIME]

So this issue with my GameCube controller has just recently come up where every time I hit the Z button (while not in full screen mode) it will move the mouse cursor to the right or it will right click. When I’m in full screen it doesn’t happen but when I hit Z and move the joy stick up or down, it changes my laptop’s volume level. How can I fix this?