Right this may very well be placebo. However, I still have stutter but not as much as I did. Running the game maxed out @ 1680x1050 PhysX OFF (258.96 WHQL) This is what I did. I realised I had more than 1 version of C++ 2008 x64 installed so I uninstalled them, leaving the latest version installed. Ran CCleaner to check for any left overs. I then realised I did not have C++ 2010 installed. So I installed both x86 and x64 versions. Checked Microsoft Update for anything newer, nothing found. I defragged and did a check disk (CHKDSK). I do get stutter, but it has gone down dramatically by the looks of things. Hopefully someone else here can test this, to confirm it.