what i've noticed is it only does it in my D: drive. (thats where i keep like everything but windows itself) and another thing is when i highlight stuff its really laggy
Very doubtful that the linked update would be of any use as you have suggested for two reasons, he has an ATi video card and your link is to chipset drivers for nForce m/boards not video cards.
The latest chipset drivers are always good to have I don't dispute that and he should install them if he hasn't already.