D3dx3: 30.dll. Repack

d3dx3_30.dll is part of legacy DirectX 9 helper libraries required by older games/apps. Restoring it safely is best done by running Microsoft's DirectX End-User Runtime installer or reinstalling the affected software rather than downloading individual DLL files.

"This application failed to start because d3dx9_30.dll was not found." How to Fix the "d3dx9_30.dll Missing" Error 1. Download the DirectX End-User Runtime d3dx3 30.dll.