2011-06-04, 04:48 AM
A better question is why the preview ever worked for you in the first place. This sounds like the standard 'preview' problem that everyone with a fast video card has been having. Since you're using PhysX, I expect you have an Nvidia video card? I wouldn't think the directX update caused a problem because Win7 ships with a newer version of DX than my XP PC has (and it has the same problem). Maybe some version of nvida driver doesn't have the issue. You might try 'roll back driver' in the Device manager.