Whenever I try to launch Dirt Showdown from the Steam Library menu, the "Launching" box appears, then closes without anything major happening.
When I go to the main executable, it says "D3D11.dll not found".
(Is it really thinking that DX11 is on an XP machine?)
I've already tried running the component installers, verifying game content, going into the registry to make sure Steam has necessary rights, along with a few other things. I'm still open to suggestions, though.