Not sure if this will help you but I had basically the same problem. I tried changing graphics settings, etc. and had no luck. While I could be wrong on this, it appears what helped me was clearing my DirectX cache. I forget exactly how to do this but you can search the web and you should find something on it. The beauty about it is that there doesn't appear to be any negatives because it just will rewrite itself.
Best of luck because what you're experiencing is very, very frustrating.
Ok thank you, i havent cleared my cache yet, i will let you know if this helps.
Unfortunately this has not helped :(
