I've been having the issue with rainbow colours that some people have reported on the forum. Everything was fine until chapter 4, now I cannot fix it. By restarting my computer I managed to mostly get rid of it, but rainbow remains around the people, my mouse cursor and some objects in the environment, as well as on parts of the menu screen. I've tried all the fixes mentioned in the forum but none of them have worked for me. I'm running Windows 7.
I remember this rainbow effect being a problem when I played the game years ago on my Win98 system. Is there any fix for it?