Chances are, upgrading to the latest version of DirectX 9 will fix the d3dx9_30.dll not found error. Install the latest version of Microsoft DirectX 9. It's unlikely this will fix the problem, but restarting is always a good first troubleshooting step.Ģ. The d3dx9_30.dll error might be a fluke or one-time issue and a simple restart could clear it up completely. Restart your computer if you haven't yet done so. Note: If you've already downloaded d3dx9_30.dll from one of those DLL download sites, remove it from wherever you put it and continue with the following steps.ġ.