Resolve D3dx9_39.Dll Missing Error on Windows 10 Quickly

If you encounter the "d3dx9_39.dll missing" or "d3dx9_39.dll not found" error, it typically means there's an issue with Microsoft DirectX. This file is crucial for applications that rely heavily on graphics, especially games. Follow these methods to resolve the error.

How to Fix D3dx9_39.dll Missing or Not Found Error?​

1. Restore the D3DX9_39.dll file Automatically​

• Download and install Fortect: Visit the Fortect website and download the software.
• Run a free scan: Open Fortect and start a scan. This will take 3 to 5 minutes to fully analyze your PC.
• Review the scan report: Once the scan completes, you'll see a detailed report of any issues.
• Start repair: Click on the START REPAIR button to automatically fix all issues. Note that you’ll need to purchase the full version to use this feature.

By using Fortect, you can automatically repair missing or corrupted system files without losing any personal data or programs.

2. Install the Latest Version of DirectX​

• Visit the Microsoft DirectX download page: Go to the Microsoft DirectX End-User Runtime Web Installer.
• Download the installer: The download should start automatically.
• Run the installer: Open the downloaded file and follow the on-screen instructions to install DirectX.
• Restart your PC: After installation, restart your computer to apply the changes.

Updating DirectX ensures you have the latest files and fixes that might solve the "d3dx9_39.dll missing" error.

3. Run Virus Scan​

• Open your antivirus software: If you don’t have one, consider downloading Malwarebytes.
• Run a full system scan: Select the option to scan your entire system.
• Fix detected issues: Follow the antivirus program's instructions to remove any detected malware.
• Restart your computer: After the scan and removal, restart your computer.

Running a virus scan can help detect and remove any malicious software that might have corrupted the d3dx9_39.dll file.

4. Reinstall the Problematic Program​

• Press Windows + R: This opens the Run dialog box.
• Type appwiz.cpl and press Enter: This opens the Programs and Features window.
• Find the problematic program: Scroll through the list to find the software causing the issue.
• Uninstall the program: Right-click on the program and select Uninstall. Follow the on-screen instructions.
• Reinstall the program: Download the latest version from the official website and install it again.

Reinstalling the problematic program can fix corrupted files that might be causing the error.

5. Update Your Graphics Driver​

• Press Windows + R: Open the Run dialog box.
• Type devmgmt.msc and press Enter: This opens Device Manager.
• Expand Display adapters: Locate your graphics card.
• Right-click and select Update driver: Choose Search automatically for updated driver software and let Windows search and install the latest driver.
• Restart your computer: After the installation, restart your PC.

Updating your graphics driver ensures compatibility and can fix the "d3dx9_39.dll missing" error.

6. Check for Windows Updates​

• Press Windows key: Open the Start Menu.
• Type windows update and select Windows Update settings: This opens the Windows Update settings.
• Click Check for updates: Let Windows search for and install any available updates.
• Restart your computer: After the updates are installed, restart your PC.

Keeping your Windows system updated can resolve various issues, including DLL errors.

7. Perform a System Restore​

• Press Windows + R, type rstrui, and hit Enter.
  
• Click Next.
  
• Select a restore point and hit Next.
  

A system restore comes in handy because d3dx9_39.dll is native to the OS, and a restore would take the computer to a time it had all the files needed to run correctly.

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8. Manually Copy the DLL File (For Advanced Users)​

For Windows 7 or Vista:

• Insert the game CD/DVD: Into your computer’s CD/DVD drive.
• Navigate to the DirectX9 folder: Open the CD/DVD drive and find the DirectX9 folder.
• Copy the DLL file: Double-click Apr2005_d3dx9_25_x86.cab, right-click d3dx9_25.dll, and select Copy.
• Paste the DLL file: Go to the game installation folder (e.g., C:\Program Files\Microsoft Games\Game Title) and paste the DLL file.

For Windows XP:

• Follow the same steps as Windows 7/Vista, but open Windows Explorer instead.

Manually copying the DLL file can be a quick fix if you have the installation media available.

These methods should help you resolve the "d3dx9_39.dll missing" error. Try each method one by one to see which works best for your situation.