Hey what kind of Video Card Driver do I need to run windows Aero transparency and stuff?

I am currently running Windows 7 but my computer says my video card driver is not up to date what do I want to use?|||You can find a new driver on the Graphic card manufacturer's web site. But I'm affraid that it won't help you and you need a faster card to run windows Aero. But still you can try to go to NVidia or ATI website, and find new driver for your video card.