Just like Sony, HP requires you buy any hardware upgrades from them, unless you know how to hack it. Otherwise stay with thier products. And if you tamper with the system with any add on cards, or new hard drives they dont support, guess what..they wont support it at all...your warrenty is useless after this point. HP and Sony LT are terrible for this reason..You can only make their stuff work, any other does not. It sucks I know, but you may want to contact HP and ask them for hard drive specs for that particular system and tell them you need a new hard drive...I can not stress this enough...Do Not...I REPEAT DO NOT tell them you put in a hard drive that wasnt theirs. They will not help you at that point.