google search your laptop model "satellite c650" for specs
under video card it will tell you what model and make it is
with graphics card model and make info search online (its either amd, intel, or nvidia) and download drivers for appropriate windows and os flavor (32bit or 64 bit)
Generally speaking, laptops uses custom drivers for the video card. You need to go to the brandname's website to get the latest version. If they don't have one (they usually do not), then you are basically out of luck.