Fixing d3dx9_39.dll Related Errors in Star Citizen

Star Citizen is an incredibly popular and immersive space simulation game, offering players the chance to explore vast galaxies, engage in thrilling space combat, and embark on exciting adventures. However, like any complex software, Star Citizen can encounter issues and errors that may hinder the gaming experience. One common error that players may come across is the "d3dx9_39.dll" error. In this article, we will delve into the causes of this error and provide you with effective solutions to fix it.

What is the d3dx9_39.dll Error?

The "d3dx9_39.dll" error is typically encountered when launching or playing Star Citizen. This error message indicates that the system is missing or unable to access the "d3dx9_39.dll" file, which is a crucial component of Microsoft DirectX. DirectX is a collection of application programming interfaces (APIs) that enables games and multimedia applications to communicate with the hardware on your computer.

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Causes of the d3dx9_39.dll Error

Several factors can contribute to the occurrence of the d3dx9_39.dll error in Star Citizen. Here are some common causes:

  • Missing or corrupted file: If the d3dx9_39.dll file is missing or corrupted, Star Citizen won't be able to access it, resulting in the error.
  • Outdated DirectX version: Star Citizen relies on specific versions of DirectX. If you have an outdated version installed, it may lead to compatibility issues and trigger the error.
  • Graphics driver issues: Outdated or faulty graphics drivers can interfere with the proper functioning of DirectX, causing the d3dx9_39.dll error.
  • System file corruption: If critical system files related to DirectX are corrupted, it can result in errors when launching Star Citizen.
  • Virus or malware infection: Malicious software can corrupt or remove important DLL files, including d3dx9_39.dll, leading to errors in Star Citizen.

Solutions to Fix the d3dx9_39.dll Error

Now that we understand the causes, let's explore the solutions to fix the d3dx9_39.dll error in Star Citizen. Follow these steps in order, and you should be able to resolve the issue and get back to enjoying the game.

Solution 1: Install the Latest Version of DirectX

The first step to resolving the d3dx9_39.dll error is to ensure that you have the latest version of DirectX installed on your computer. Here's how to do it:

  • Visit the official Microsoft DirectX download page.
  • Download the latest version of DirectX compatible with your operating system.
  • Run the downloaded installer and follow the on-screen instructions to complete the installation.
  • Restart your computer and launch Star Citizen to check if the error persists.

Solution 2: Update Your Graphics Drivers

Outdated or faulty graphics drivers can cause conflicts with DirectX and trigger the d3dx9_39.dll error. To update your graphics drivers, follow these steps:

  • Identify the manufacturer and model of your graphics card.
  • Visit the manufacturer's website and navigate to the support or drivers section.
  • Locate the appropriate drivers for your graphics card and download the latest version.
  • Run the downloaded installer and follow the on-screen instructions to update your drivers.
  • Restart your computer and launch Star Citizen to see if the error is resolved.
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Solution 3: Perform System File Check

Corrupted system files can lead to various errors, including the d3dx9_39.dll error. Windows provides a built-in tool called System File Checker that scans and repairs corrupted system files. Here's how to use it:

  • Press Windows key + X and select Command Prompt (Admin) or Windows PowerShell (Admin).
  • In the command prompt window, type the following command and press Enter: sfc /scannow
  • Wait for the scan to complete. If any corrupted files are found, the tool will attempt to repair them automatically.
  • Restart your computer and launch Star Citizen to check if the error persists.

Solution 4: Run an Antivirus Scan

Viruses and malware can wreak havoc on your system files, including DLL files like d3dx9_39.dll. Performing a thorough antivirus scan can help identify and remove any malicious software that may be causing the error. Follow these steps to run an antivirus scan:

  • Ensure that your antivirus software is up to date.
  • Open your antivirus software and initiate a full system scan.
  • Allow the scan to complete, and take appropriate actions if any threats are detected.
  • Restart your computer and launch Star Citizen to see if the error is resolved.


The d3dx9_39.dll error in Star Citizen can be frustrating, but by following the solutions outlined in this article, you should be able to fix it and get back to enjoying your intergalactic adventures. Remember to keep your DirectX version up to date, update your graphics drivers, perform a system file check, and run regular antivirus scans to maintain a smooth gaming experience.


Q1: Can I fix the d3dx9_39.dll error by reinstalling Star Citizen? A: Reinstalling Star Citizen alone may not fix the error. It's recommended to follow the solutions mentioned in this article for a comprehensive fix.

Q2: Are there any other DLL errors I should be aware of in Star Citizen? A: While the d3dx9_39.dll error is one of the common ones, there can be other DLL-related errors as well. If you encounter any, it's best to research specific solutions for that particular error.

Q3: Is it necessary to update DirectX even if I'm not encountering any errors? A: It's generally a good practice to keep DirectX up to date, as newer versions often include performance improvements and bug fixes. Updating may prevent potential errors in the future.

Q4: Can I use third-party driver update software to update my graphics drivers? A: It's recommended to download and install graphics drivers directly from the manufacturer's website to ensure compatibility and avoid potential issues that third-party software may introduce.

Q5: How often should I run antivirus scans on my computer? A: Running regular antivirus scans is a good practice to ensure the security of your system. Depending on your usage and internet activities, it's advisable to run a scan at least once a week.