Penumbra Black Plague causing blue screen

[Contrarium]

Windows 7 64-bit. AMD Radeon HD 6520D. Steam is saying all files are validated...
Since it's saying on Steam that the game has no local files, I think something got messed up there. I tried executing the game from the main directory and got this error. (attached)

I tried downloading the trial version but that didn't work either; the same thing happened. I really don't know what to think.