Ok, just stumbled upon this thread and I have this same issue across the board with all of our Win 7 64-bit PCs. I applied these settings you stated above...it worked for about 1 minute refresh wise on 1 PC and now I am getting a consistent freezing or a static screen image that never changes but only if I manually hit refresh constantly...and that doesn't always work. I don't see how to attach an image file here and I can't host the image, otherwise I would show you. Basically at best, I get a weird checkerboard image when connected. What is up with this? Is there not a consistent set of settings that will work for Win7 64-bit? This is bad as every new PC we get now is Win7 64-bit!!! Help, help!
Would it matter if we are running Symantec Endpoint protection? Any other potential software conflicts? Thanks for any help!! Just to clarify I have the matching settings selected as in this thread above.