‘D3dx9_42.dll is missing’ on Windows 10: Here are 3 solutions to help you

By: Aleksandar Ognjanovic
3 minute read
D3dx9_42.dll is missing

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More than a few users run into this or similar problems, especially the avid gamers. They try to start the application or, let’s say a game of some kind, and they’re suddenly prompted with ”D3dx9_42.dll is missing” error in Windows 10. Even though it looks scary, there’s nothing to worry about.

This is one of many DirectX errors that are quite common for all iterations of the Windows platform, including Windows 10. So, in case that you run into it, make sure to check the solutions below.

How to fix DirectX error ”D3dx9_42.dll is missing” in Windows 10

  1. Install DirectX
  2. Reinstall the problematic program or game
  3. Check your GPU drivers

Solution 1 – Install DirectX

This exact DLL file belongs to DirectX. As you might know, DirectX is a bundle of different applications linked to multimedia and game programming. Without DirectX, you’ll be unable to run any game on the Windows shell. And that’s exactly why you’re prompted with this error. One of the essential DirectX files is missing from the System32 folder and you’ll need to get it back where it belongs.

Firstly, we strongly advise you to avoid DLL-download websites. Avoid them like plague. Some of them might indeed provide proper DLL files, but the risk of malware is too high.

Now, if there’s one Windows game-related redistributable that can be found everywhere, it’s DirectX. You can navigate to the installation setup of any given game you have in your possession and it should be there. From there, just run the installer and update DirectX. You can aim for the latest version, but that’s not of immense importance. Any DirectX is better than none.

Otherwise, you can download DirectX from the official Microsoft site.d3dx9_43.dll is missing

Solution 2 – Reinstall the problematic program or game

Sometimes, the problem may lie in the game or application you’re running, rather than in DirectX. Such complex programs can easily get corrupted or can suffer from repetitive incomplete files. On top of that, if we assume that other games or applications are working, it’s simple to conclude what’s the culprit.

In addition, before we move to complete reinstallation segment, it’s worth mentioning that the certain game desktop clients, like Steam or Origin, offer the integrity checking tool. With this tool, you can check for the integrity of the installation files and fix the possible corruption.

On the other hand, if that’s taking you nowhere, the reinstallation should be your next step. Follow the instructions below to reinstall the affected program or game.

  1. In the Windows Search bar, type control and open Control Panel.

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    2. Click “Start Scan” to find Windows issues that could be causing PC problems.
    3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

  3. Choose Uninstall a program.
  4. Right-click the troubling program or game and uninstall it. Before that, you might want to backup your saves.
  5. Now, navigate to the installation and AppData folders, and clear all remaining files.
  6. Start the setup and install the program again and look for changes.

Solution 3 – Check GPU drivers

Finally, if both of the aforementioned solutions were futile, all our suspicion gets redirected to drivers. The outdated or unsuitable GPU drivers can also provoke this or similar errors. They are directly related to DirectX and the functionality of all related applications heavily depend on the GPU properly doing its job.

Fore more information on how to update your graphics drivers, check out this guide.


Fix''D3dx9_42.dll is missing'' in Windows 10 (1)

Most of the time, the generic GPU drivers provided via Windows Update won’t suffice. So, in order to get the proper drivers, you’ll need to look in the OEM’s official site.

These are the links to three major manufacturers. Once there, you’ll have the easy time locating and downloading the proper drivers.

At the end, after you install the proper drivers, restart your PC and run the program again. We hope that this was a helpful read and that, with the included steps, you’ll be able to overcome the ”D3dx9_42.dll is missing” error.

In case you have questions, suggestions or remarks, make sure to post them in the comments below. We look forward to your feedback.

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For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

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