Every Microsoft operating system since Windows 98 can be affected by d3dx9_33.dll and other DirectX issues. This includes Windows 11, Windows 10, Windows 8, etc.
How to Fix Cannot Start Program Because d3dx9_33.dll Is Missing Error ❌ Windows 10/7/11💻32/64 bit
Follow these steps in the order they are presented below to try the most likely solutions first.
Restart your computer if you haven't already done so.
The d3dx9_33.dll error could be a fluke or a one-time issue, and a simple restart may fix it completely. This is unlikely to fix the issue, but a restart is always a good first troubleshooting step.
