Fixing a D3dx9_43.dll missing error requires three simple actions. In the following post I’ll provide more details about this error as well as the repair steps that’ll eventually enable you to get rid of this error so you can keep playing your favorite game.
This dll is part of Direct3D 9 Extensions from Microsoft DirectX.
DirectX technology is already embedded in your Windows system and it enhances the performance of PC games as well as other multimedia based applications.
Many problems with this dll are reported from Call of Duty players as well as from players of other popular PC games. The most common error is when trying to launch a game and instead Windows pops up an error message saying that: The program can't start because d3ddx9_43.dll is missing from your computer . Try to reinstall the program to fix this problem. Other common errors: Failed to load d3dx9_43.dll and dll is missing.
The causes to this error
Your version of this dll is probably incompatible and/or your video drivers or other ‘display related’ drivers are either incompatible or outdated.
Quick repair guide
(1) Update Windows
If the version of your DirectX is incompatible, then a Windows Update should detect that and update your DirectX installation.
Has this solved the problem? If not:
(2) Manually update to the latest DirectX installation
Simply download and install the latest DirectX installation.
(3) Update your video card driver and all other incompatible drivers
Another common reason for D3dx9_43.dll missing error is a problem with your video card driver and/or other ‘display related’ drivers. They might be Incorrect/corrupt/incompatible. To detect and update problematic drivers:
(1) Diagnose your drivers using this tool
(2) By the end of the diagnosis open the Drivers section
(3) Is your video card driver valid? If NOT – update it
(4) Are there any other problematic drivers? If YES, update them as well
(5) Restart Windows