Computer users may sometimes have dll problems, particularly error messages referring to the d3d9.dll file. D3d9.dll errors can come from a number of games, but in some cases they may be generated by applications as well. Whenever d3d9.dll errors appear, the game that uses the d3d9.dll may fail to work properly, if at all.

You need to know that the d3d9.dll file is a portion of the Microsoft DirectX package. This d3d9.dll file is a 32-bit Windows dll, included into DirectX version 9. Attempts of fixing computer errors related to the d3d9.dll file by manually copying the file from somewhere else will not work, so do not try this. The right way to get rid of the d3d9.dll errors is to reinstall Microsoft DirectX; you can download the most recent version of Microsoft DirectX right here.

Please note that you just need to get and install the latest version, because the latest version of DirectX includes all previous DirectX releases so even if your game uses an older version of DirectX, it will work properly. By installing the most recent DirectX version, you should normally get rid of any d3d9.dll errors.