I've played episodes 202 and 203 on this same configuration with no issues. Today, I installed episode 204 and it crashes to desktop when I click on "Launch Game". However, now all season two episodes will not launch and give a similar error as in the screenshot. I've installed several of the season one episodes (the newer ones with different activation) and they launch just fine as do all my other games. I'm not sure what has changed between episodes 203 and 204 on my system.
I've upgraded my DirectX to the March 2008 version as well as uninstalling and reinstalling the latest video driver for my card. I'm running 64-bit Vista Ultimate. I also tried uninstalling the latest Vista compatibility patch that came out on 3/12 with no luck. I've included a screenshot of the error window as well as my dxdiag.txt.
Thanks in advance!