The easiest way to the driver downloads is to download the drivers from the manufacturers website. Look for drivers / downloads / support sections to find your drivers. Simply enter the model number and search. In this case you ll be looking for a video driver or display drivers.
Actually i just found this link. Go there and click on detect my model number
here. Your model number is not recognized by the site as you entered it. Do you see numbers starting with vgn or pcg ? You should find your display drivers at the link. Sony is pretty decent with their driver support system. Shouldnt be hard.