Hey Firestar,
Thanks so much for the support, sorry you're getting this problem,
not entirely sure what could be causing this problem but it seems to be something with the graphics card. I would suggest you try a different resolution. If youre not getting the resolution choices when launching the game if you hold the ALT button you would see a selection of different resolutions.
Please try this and let me know if it works, I'd really like to help you out,
Rafi