driver help

okay, i dowlnoaded directx 10. i downloaded diablo II and diablo II LOD recently, and i can't play it because i needed to install directx 6 or higher. okay i got v.10 installed and i've rebooted my computer already. and it also said i need to update my driver. i did the little dxdiag thing and all i could find was something that said vga.dll so i'm guessing thats my video driver. (yes i know i have a shitty computer) but anyway i searched the hell out of google looking for where to update my vga.dll thing and can't find a correct one anywhere..any help?