That error screen you have there aso544 is not a Windows error, nor is it (that I'm aware of) a Silent Hunter message. Ubi would not have put IBM's OS2 nor NT4 on their list of OSes to use... Do you have an AV app running, or some "protection" app, such as a McAfee overlord that came with the computer? Did you install the DirectX v9.0c when you ran the game install?