anthony detgen

So I got a cheap mouse that has 6 buttons and I couldnt find a manufacture or any software for it. The 6th mouse button defaults to "Win+D". I know this because I have tried to use programs like X-mouse and Hydro mouse to change what it does. If I am on the desktop or anything other programs and I press it, It will open windows start. If i am typing and press it, it will type "d". Does anyone know a program that I can change that to something else? Or a way to turn off windows start menu?