d3dx9_30.dll error offen appears you start a software program and specially start a game. d3dx9_30.dll errors are caused by Microsoft DirectX. How to resolve D3dx9_30.dll Not Found Error?.

Common d3dx9_30.dll error messages
- "D3DX9_30.DLL Not Found"
- "File d3dx9_30.dll not found"
- "The dynamic link library d3dx9_30.dll could not be found in the specified path [PATH]"
- "The file d3dx9_30.dll is missing"
- "D3DX9_30.DLL is missing. Replace D3DX9_30.DLL and try again."
- "D3dx9_30.dll not found. Reinstalling might help fix this."
- "Missing component d3dx9_30.dll"
- "This application has failed to start because d3dx9_30.dll could not be found!"

How to install d3dx9_30.dll file?

1. Press Start and select Run
2. Type CMD and press Enter (or if you use Windows ME, type COMMAND)
3. Type regsvr32 d3dx9_30.dll and press Enter
4. In the end, you should receive a message saying that your file was successfully installed or uninstalled.