Go to HP.com, click on Support and Drivers, click on Drivers and Software, enter the model number, select your OS, and there you are. Somewhere around here: http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=228&lc=en&cc=us&dlc=en&sw_lang=&product=3811075
My personal experience is that HP "drivers" contain several pieces of HP software, some of which put themselves into autostart, all of which make your machine slower. Be wary of them. Look in startup and the registry (if you know how) and kill them.