How to fix d3dcompiler_43.dll not found or missing. d3dcompiler_43.dll problems are caused in one way or another by problems with Microsoft DirectX. The d3dcompiler_43.dll file is one of many included in the DirectX software collection. Since DirectX is used by most advanced graphics programs and Windows-based games, the d3dcompiler_43.dll error usually only shows up when using these…