The d3dcompiler_42.dll file is one of many files in the DirectX software collection. Since DirectX is used by most Windows-based games and high-end graphics programs, d3dcompiler_42.dll errors usually only appear when using these programs.
D3dx9_42.dll not found?✅ How to fix d3dx9_42 is missing error on your computer💻Windows 10 32/64bit
Follow these steps in the order given to complete the simpler solutions first.
Restart your computer if you haven't already. The d3dcompiler_42.dll error may be a fluke and a simple restart may fix it completely.
Install the latest version of Microsoft DirectX. There is a good chance that upgrading to the latest version of DirectX will resolve the DLL not found error.
