How to Troubleshoot ‘d3dx9_39.dll is missing’ on Windows 10

The file d3dx9_39.dll is one of the many files contained in the Microsoft DirectX software collection. This means that problems with d3dx9_39.dll are somehow caused by a problem with Microsoft DirectX.

Since DirectX is used by most Windows-based games and advanced graphics programs, errors usually only occur with these programs.

What causes ‘d3dx9_39.dll missing’?

Sometimes a virus attack on your computer can be very fatal and damage DirectX and many other system files. Because of these corrupted system files, your computer can no longer function properly. read more