D3dx9_39.dll: What It Is & How To Fix Errors

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Written by: Stelian Pilici

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Have you ever encountered an error message on your Windows computer that mentions a file called “D3dx9_39.dll”? If so, you’re not alone. This article will explain what D3dx9_39.dll is, why it is important, and how to fix any errors related to it.

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What is D3dx9_39.dll?

D3dx9_39.dll is a dynamic link library file that is part of the DirectX software collection developed by Microsoft. DirectX is a set of application programming interfaces (APIs) that allows software, especially games, to communicate with the hardware components of a computer, such as the graphics card and audio devices.

The D3dx9_39.dll file specifically contains functions and resources related to DirectX 9, which is an older version of DirectX. Many older games and applications still rely on DirectX 9, which is why the D3dx9_39.dll file is still relevant today.

Why is D3dx9_39.dll Important?

The D3dx9_39.dll file is crucial for running games and applications that require DirectX 9. Without this file, these programs may not function properly or may not run at all. When you encounter an error related to D3dx9_39.dll, it usually means that the file is missing, corrupted, or incompatible with your system.

It’s important to note that D3dx9_39.dll is not a system file, but rather a file associated with DirectX. Therefore, it is not included with the Windows operating system by default. Instead, it is typically installed along with the game or application that requires it.

Common D3dx9_39.dll Error Messages

When there is an issue with the D3dx9_39.dll file, you may encounter one of the following error messages:

  1. “The program can’t start because D3dx9_39.dll is missing from your computer.”
  2. “D3dx9_39.dll not found.”
  3. “File D3dx9_39.dll is missing.”
  4. “D3dx9_39.dll is either not designed to run on Windows or it contains an error.”

If you come across any of these error messages, it’s important not to panic. There are several solutions you can try to fix the issue and get your game or application running smoothly again.

How to Fix D3dx9_39.dll Errors

Here are some methods you can use to fix D3dx9_39.dll errors:

Method 1: Reinstall DirectX 9

The first step in resolving D3dx9_39.dll errors is to reinstall DirectX 9. To do this, follow these steps:

  1. Visit the official Microsoft website and download the latest version of DirectX 9.
  2. Run the downloaded installer and follow the on-screen instructions to complete the installation.
  3. Restart your computer to apply the changes.

After reinstalling DirectX 9, try running the game or application again to see if the error has been resolved.

Method 2: Update Graphics Drivers

Outdated or incompatible graphics drivers can sometimes cause D3dx9_39.dll errors. To update your graphics drivers, follow these steps:

  1. Open the Device Manager by pressing the Windows key + X and selecting “Device Manager” from the menu.
  2. Expand the “Display adapters” category.
  3. Right-click on your graphics card and select “Update driver.”
  4. Choose the option to search automatically for updated driver software.
  5. Follow the on-screen instructions to complete the driver update process.
  6. Restart your computer to apply the changes.

Once your graphics drivers are up to date, try running the game or application again to see if the error persists.

Method 3: Scan for Viruses or Malware

In some cases, D3dx9_39.dll errors can be caused by malware or viruses on your computer. It’s important to regularly scan your system for any malicious software. We recommend using Malwarebytes Free, a trusted antivirus program, to scan and remove any threats.

Summary

D3dx9_39.dll is a crucial file for running games and applications that rely on DirectX 9. When encountering errors related to this file, it’s important to take the necessary steps to fix the issue. Reinstalling DirectX 9, updating graphics drivers, and scanning for viruses or malware are some of the methods you can try to resolve D3dx9_39.dll errors. By following these steps, you can ensure a smooth gaming and application experience on your Windows computer.

How to Stay Safe Online

Here are 10 basic security tips to help you avoid malware and protect your device:

  1. Use a good antivirus and keep it up-to-date.

    Shield Guide

    It's essential to use a good quality antivirus and keep it up-to-date to stay ahead of the latest cyber threats. We are huge fans of Malwarebytes Premium and use it on all of our devices, including Windows and Mac computers as well as our mobile devices. Malwarebytes sits beside your traditional antivirus, filling in any gaps in its defenses, and providing extra protection against sneakier security threats.

  2. Keep software and operating systems up-to-date.

    updates-guide

    Keep your operating system and apps up to date. Whenever an update is released for your device, download and install it right away. These updates often include security fixes, vulnerability patches, and other necessary maintenance.

  3. Be careful when installing programs and apps.

    install guide

    Pay close attention to installation screens and license agreements when installing software. Custom or advanced installation options will often disclose any third-party software that is also being installed. Take great care in every stage of the process and make sure you know what it is you're agreeing to before you click "Next."

  4. Install an ad blocker.

    Ad Blocker

    Use a browser-based content blocker, like AdGuard. Content blockers help stop malicious ads, Trojans, phishing, and other undesirable content that an antivirus product alone may not stop.

  5. Be careful what you download.

    Trojan Horse

    A top goal of cybercriminals is to trick you into downloading malware—programs or apps that carry malware or try to steal information. This malware can be disguised as an app: anything from a popular game to something that checks traffic or the weather.

  6. Be alert for people trying to trick you.

    warning sign

    Whether it's your email, phone, messenger, or other applications, always be alert and on guard for someone trying to trick you into clicking on links or replying to messages. Remember that it's easy to spoof phone numbers, so a familiar name or number doesn't make messages more trustworthy.

  7. Back up your data.

    backup sign

    Back up your data frequently and check that your backup data can be restored. You can do this manually on an external HDD/USB stick, or automatically using backup software. This is also the best way to counter ransomware. Never connect the backup drive to a computer if you suspect that the computer is infected with malware.

  8. Choose strong passwords.

    lock sign

    Use strong and unique passwords for each of your accounts. Avoid using personal information or easily guessable words in your passwords. Enable two-factor authentication (2FA) on your accounts whenever possible.

  9. Be careful where you click.

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    Be cautious when clicking on links or downloading attachments from unknown sources. These could potentially contain malware or phishing scams.

  10. Don't use pirated software.

    Shady Guide

    Avoid using Peer-to-Peer (P2P) file-sharing programs, keygens, cracks, and other pirated software that can often compromise your data, privacy, or both.

To avoid potential dangers on the internet, it's important to follow these 10 basic safety rules. By doing so, you can protect yourself from many of the unpleasant surprises that can arise when using the web.

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