Need help updating my graphics card

I need some help every time I play Day of Defeat Source my comp shuts down and restarts itself, my friend told me that it has to do with the fact that the graphics card isn't updated. I went to the site found my graphics card(which is ATI RADEON XPRESS 200 series) but when I go to update it isn't under the list of products. I looked around google but found nothing on updating the graphics card and the weird thing is it only restarts when I play Day of Defeat source it never restarts when I play Counter Strike source. Any ideas on what I can do to stop the restarting or know a site where I can update my graphics card?

 

Put in your operating system and card details into this, and you should end up with the correct drivers.