Penumbra Overture - problem with graphics card

[vladdracul]

Ok Pluto, for #2 how do I uninstall all that?
I've already tried uninstalling the ATI files but I'll try it again the way you say to do it...
and when I was looking for things to uninstall I found 3 separate ATI folders in my main (C: ) drive; folder 'ATI' in C: drive, then 'ATI' and 'ATI Technologies' in Program Files. Do I uninstall all of them?
Oh and another thing, when I was uninstalling 'ATI Technologies' a window came up asking if I wish to "Remove ATI Radeon graphics software, leave chipset software (RECOMMENDED)." OR "Completely revomve all ATI/AMD (Graphics/Chipset) software". Which one should I select?