When you start some games system can pop up message on the absence of some files. Usually it is d3dx9_39.dll and others. So we will tell you how to fix error “d3dx9_39.dll is missing”.
This error indicates that the game or program requires directX9 library to run properly. Typically, this error can be obtained by trying to run the old game on the new system. For example, Windows 10 has already pre-installed DirectX 11, which, of course, has no libraries from older versions libraries with d3dx9_39.dll and others. We don’t recommend to download d3dx9_39.dll the library from obscure sites to anyone. You never know what is hiding under this library. For solving this problem with error d3dx9_39.dll, we recommend to use a special program DirectX End-User Runtimes, which you can download from Microsoft official site. This installer will analyze the existing libraries on your system and add the right ones by downloading them from a reliable source.
After installing the required components as d3dx9_39.dll, you can enjoy the game or program even without rebooting. By the way, the installation is fully automated and does not require deep knowledge.