Hi,
(sorry, I don't know too much about computers, so please bear with me)
Ok, I am having constant problems playing my game. So I thought, since I have an SiS Driver, that I would update it since that is what the people on the forum would say.
So I updated my driver now I cannot roll it back. I went onto the website to download it so I could install my old driver, but It seems that what I downloaded didnt work either. After I updated, it made the game even worse, and everytime I boot up, I find that it sais Keyhook.exe missing and SiStray.exe missing.

It would appear you have not installed the driver package correctly, or it was the wrong driver.

Have you checked Windows Update Custom Install to see if they ofer a better driver?