there are programes such as DCpro driver clean pro. It can remove everything that hasw to do with nvidia. I had a slight problem with it that wen i remove everything that has to do with nvidia i can't install a new driver hehe..it's like sager has kind of special file or something for the driver to work porperly and that is removed with dcpro, maybe. I had tried it twice and i ended up reinstalling 77.77 stock drivers and then just putting update on the display in device manager (or by just installing the tweaked driver).