How To Fix D3DX9_39.dll Is Missing Error In Windows 10, 7 And 8

One of the most common Windows errors, along with the XINPUT1_3.dll, MSVCR110.dll,  MSVCR100.dll,  VCRUNTIME140.dll, and MSVCP140.dll errors, is the D3DX9_39.dll error. How the error is displayed is usually seen in the form of a pop-up window with a message that says that “The program cannot start because d3dx9_39.dll is missing from your computer. Try reinstalling the program to correct this problem” or “The program can’t start because d3dx9_39.dll is missing” when running a certain program or game, such as League of Legends. The good news is that the error is easy to fix, and we won’t have to resort to third-party programs.

HOW TO INSTALL D3DX9_39.DLL ON WINDOWS

The D3DX9393.dll error is usually related to the lack of some libraries from the Visual C++ libraries for Visual Studio for Windows 7, 8, and 10. Therefore, reinstalling the libraries to solve the D3DX9_43.dll error is the only possible solution.

• Download Visual C++ for Windows

Before proceeding with the download, we will have to check the type of system that our computer runs, which can be a 32-bit or 64-bit. The process is as easy as right-clicking on the Windows icon in the Start bar and accessing the System option. Under System Type, we can see the exact number of bits our system runs at.

Once we have made sure of the number of bits supported by our computer, we will click on the download link and select one of the two files that the page shows: for 64-bit systems, we will have to download the x64 file,  while for 32-bit systems the file to download is x86.

Finally, we will install the program as if it were a common program and then restart the computer to apply the changes correctly.

DOWNLOAD D3DX9_39.DLL MANUALLY FOR WINDOWS 10, 8 AND 7

If the previous process has not worked, we will most likely add the file manually to the necessary folders.

• Download D3DX9_39.dll for 32-bit systems
• Download D3DX9_39.dll for 64-bit systems

When we have downloaded the file, we will unzip it and paste it into all the folders of the programs that have shown the error in question. Accessing these folders is as simple as right-clicking on the program icon on the Windows Desktop and selecting Open file location.

To prevent the error from reappearing in other Windows programs, we’ll paste the same file into the System32 folder inside the Windows folder, specifically in the following path:

• C:\Windows\System32\

SOLUTION TO THE ERROR D3DX9_39.DLL IF THE ABOVE DOES NOT WORK

If, after following the steps that we have detailed in the article, the problem persists, the only possible solution is to resort to a command accessible only through the Windows Command Prompt, which we can access by typing the word CMD in the search bar from Windows by right-clicking on the result to run the program with administrative privileges.

Then we will enter the following command:

• sfc /scannow

A diagnostic tool will automatically run that, in addition to adding necessary libraries to the system, will repair all Windows files that show some type of error. Once the diagnosis is finished, we will restart the computer for the changes to take effect.