Generally you can find the most recent driver at the website of the manufacturer of your video card. If you can't find a website, then check with the manufacturer of your computer. Be sure to have the model number of your computer handy to make this process as smooth as possible.

If you don’t know offhand what type of video card you have one way to get an idea is to check the device manager. Here’s how:
There are no hard fast rules on what this text will say but the general format is something along the lines of "Manufacturer Make Model Number" . An example is "3Dfx Interactive, Inc. Voodoo3" This tells you that your video card is a Voodoo3 made by 3Dfx Interactive. Once you know who makes your card, it’s just a quick search on the internet to find their website, in this case www.3dfx.com.

Here’s a short list of some common video card manufacturer’s and their website’s: