Well you cant disable onboard graphics from within Windows. You have to go into your bios, usually by presing delete key on startup. Then hopefully you will have an option within the bios to turn it off. If you cant do that, then well im not sure. If you try to uninstall or delete the drivers within windows, im pretty sure that everytime you startup the computer Windows is gonna look for them, and that isnt good. I believe that on HP machines such as yours you have to physically do something to the onboard video, I'd bring it somewhere if you had to do that. Dunno though