When I went to play The Walking Dead today, it told me that the game needed to be "converted into a new more efficient format". After that was complete, the game would not run, and gave me the title error. I tried checking the game cache, nothing wrong there. I tried rebooting steam. No help. I tried restarting my computer. Still no. Finally I re installed the game, and it still doesn't work. It's not blocked by my firewall, my video and sound drivers are up to date, I tried running it in compatibility mode, tried running the .exe directly, and the game fails to start. The game worked perfectly fine before this "conversion".
Attached is a partial DxDiag information dump. I removed much of it to fit within the file size limit for this forum.
Edit: Problem fixed. I had a corrupted prefs file.