Driver:

Also called a "device driver," it is a program routine that links the operating system to a peripheral device. Written by programmers who understand the peripheral hardware's command language and characteristics, the driver contains the precise machine language necessary to perform the functions requested by the application.

Here are the drivers HP lists for the devices they put in your computer:

http://h10025.www1.hp.com/ewfrf/wc/s...56779&lang=en#

You might try the NVIDIA Unified Graphics Driver Update as well as the Microsoft Standard Dual Channel PCI IDE Controller Update.