D3DX9_30.DLL "Not Found" or "Missing" Errors

A lot of you gamers out there have posted in the forum or sent me emails about d3dx9_30.dll errors. Most of the time, the error shows up as either "The file d3dx9_30.dll is missing" or "D3dx9_30.dll not found. Reinstalling might help fix this."

No matter what the specific error, the cause is almost always an issue with DirectX. Check out this step by step guide to fixing d3dx9_30.dll errors so you can get back to destroying the enemy or saving the princess.