The d3dx9_26.dll file is part of DirectX. Most Windows games and graphics programs use DirectX, so errors with this file usually happen when running these programs.

Windows 98 and later versions can experience d3dx9_26.dll or DirectX issues. Windows 11, Windows 10, Windows 8, and other versions may also have these problems.

Fix D3dx9_26.dll Errors

Try these steps in order. The first solutions are easier to apply.

Avoid downloading d3dx9_26.dll from any “DLL download site.” Getting DLL files from such sites is risky for several reasons.

If you already downloaded it, delete it from the folder where you placed it. Then, follow the next steps.

1. Restart Your Computer

If you haven’t restarted your computer yet, do so now. The d3dx9_26.dll error might be temporary, and a restart could resolve it.

While this may not always fix the issue, it is a simple troubleshooting step.

2. Boot into Safe Mode

If the error prevents you from accessing Windows normally, start your computer in Safe Mode to complete the following steps.

3. Install DirectX Redist (June 2010)

Download and install DirectX Redist (June 2010). This package includes the d3dx9_26.dll file, which may fix the missing file error.

4. Extract the DLL File Manually

If installing DirectX End-User Runtime does not resolve the issue:

• Use a file extraction tool to open the downloaded file.

• Locate the CAB file inside.

• Extract it and find the d3dx9_26.dll file.

• Copy it to the folder where the error message says it is missing.

5. Check for DirectX on the Game or App Disc

If the latest DirectX version from Microsoft does not help:

• Check your game or application installation disc for a DirectX installer.

• Many software developers include a compatible version of DirectX on the disc.

• Sometimes, the version on the disc works better than the latest one available online.

6. Reinstall the Game or Software

Uninstall and then reinstall the game or program that is showing the error. A corrupted file related to d3dx9_26.dll could be causing the issue, and reinstalling may fix it.

7. Restore the File from the Latest DirectX Package

If previous steps did not work, try extracting the file manually from the latest DirectX package.

8. Update Your Video Card Drivers

Though not a standard solution, updating your graphics card drivers could sometimes fix the DirectX issue. Check for the latest drivers from your GPU manufacturer’s website.