the best way for updating is to search at vendor site as they keep updating the driver frequently.
you can try the driver updating applications like Driver Agent or Advanced Driver Optimizer they will get you the latest updates 4 ur drivers so u dont have to search them they will download the latest updates and will install them. I prefer Advanced Driver Optimizer as with it I have to just scan and can update all my drivers in single click just a best optimizer for driver.
The best part is if it installed incorrect driver then I can roll back using their restore facility.
you can download it from (www.driveroptimizer.com)