opengl supported? need driver!

on my other computer opengl games arent working. its got integrated s3 km400 graphics. (yeah, i know its not good, but it can play some games fine!)

The problem is the same with MY computer as well. NO OPENGL GAMES WORK! Mohaa worked before i reinstalled windows, but now it freezes and i am left with a distorted picture, and have no choice but to reboot. if anyone can find an opengl driver for either a s3 or via card i would be greatful. thx.