How to fix
Codex64.dll missing or not found error
on Windows

Hello. I can't launch several games on my Windows PC because I get Codex64.dll is missing or not found errors. How do I fix this problem?

DLL (Dynamic Link Library)[ref en-1] files are code libraries that can be shared between programs. They contain code that programs can use when they need to perform a specific task. DLL files are commonly used to provide additional functionality and services in Windows operating systems and applications.

The primary advantage of using DLL files is that they allow multiple programs to share the same code, potentially reducing the amount of memory required to run those programs. As a result, DLL files have become an essential component of modern software development.

When a DLL file is missing or not found, the programs that rely on it may experience problems. If a file, such as codex64.dll, is missing or not found, games and graphics-intensive applications that rely on it may not function properly or at all. The codex64.dll DLL file was created by the ACME corporation and is not included with the Windows operating system.

This file contains sets of instructions, procedures, and driver functions required to run specific games and applications on the Windows operating system. There are several possible solutions to this issue, including reinstalling the application or game that requires the codex64.dll file, updating the driver associated with the file, or downloading and installing the file from a reputable source.

It is important to note that users should exercise caution when downloading DLL files from the internet, as they may be infected with malware or other malicious software. In this guide, you will find 5 steps that should help you fix Codex64.dll missing or not found error in Windows. You can also try a maintenance tool like [d1] that can fix most system errors, BSODs,[ref en-2] corrupted files, and registry[ref en-3] issues. Otherwise, follow the guide below.

Solution 1. Fix Corrupted System Files

Use Command Prompt commands to repair system file corruption:

• Open Command Prompt as administrator
• Use the following command and press Enter:
  sfc /scannow

• Reboot your system
• If SFC returned an error, then use the following command lines, pressing Enter after each:
  DISM /Online /Cleanup-Image /CheckHealth
  DISM /Online /Cleanup-Image /ScanHealth
  DISM /Online /Cleanup-Image /RestoreHealth

Solution 2. Reinstall the Affected Application

• Press the Windows key + R simultaneously to open the Run dialog box.
• Type appwiz.cpl in the text field of the Run dialog box.

• Hit the Enter key to open the Programs and Features window in the Control Panel.
• In the Programs and Features window, locate the application that is displaying the error.
• Select the application and click the Uninstall button.
• Follow the on-screen instructions to complete the uninstallation process of the application.
• Once the application is uninstalled, open a reliable download source such as the official website or Microsoft Store.
• Download the application again from the source.
• Install the application on your system as per the on-screen instructions.

Solution 3. Run a Malware Scan

It is possible that a malware infection may be the cause of the Codex64.dll missing or not found error in Windows. It is important to run a comprehensive security scan to rule out this possibility and ensure that the computer is not infected. This can help to prevent further issues with the Windows operating system and ensure that it is functioning properly.

If you have access to a security scanner, or if your organization pays for one, you can use it to scan your entire system to check for a virus infection. Otherwise, you can use Windows Defender to scan your system:

• Click on the Windows Start menu or press the Windows key on your keyboard.
• Type Microsoft Defender in the search bar and click on Microsoft Defender Antivirus to open the application.
• Click on the Virus & threat protection option in the left-hand menu.
• Click on the Quick scan or Full scan option, depending on your preference.

• If you choose Quick scan, Microsoft Defender Antivirus will scan the most vulnerable and commonly infected areas of your computer.
• If you choose Full scan, Microsoft Defender Antivirus will scan your entire computer, including all files, folders, and programs.
• Click on the Scan now button to start the selected scan type and wait for the scan to complete.
• The time it takes will depend on the size of your hard drive and the number of files being scanned.
• Once the scan is complete, you will be informed of any detected threats, and you can choose to quarantine or remove them.
• If no threats are found, Microsoft Defender Antivirus will inform you that your device is secure.

Solution 4. Run System Restore

System Restore is a feature in Microsoft Windows that allows users to revert their computer's state to a previous point in time. This can be helpful if you have made changes to your system that are causing problems.

• Press the Windows key + R on your keyboard to open the Run box.
• Type SystemPropertiesProtection and press Enter.
• Go to the System Protection tab.

• You will see the System Restore… button. Click it to run System Restore.
• Follow the prompts until you can select a restore point.
• Select the one you want (ideally before the issue started occurring) and go ahead with the process.

Solution 5. Repair Install Windows

• Visit the official Microsoft website to download Windows 11 or Windows 10 Installation Media.
• Run the Media Creation Tool and select Create Installation Media for another PC.
• Select your USB drive.
• Let the Process complete of writing the Installation files to the USB drive.
• Click Finish.

• On the PC you wish to upgrade, Press Windows + E to open the File Explorer.
• Open the Removable drive and click Setup.exe.
• Accept the license terms on the next screen.
• Confirm the Upgrade options – Files, apps and Settings are kept.
• Click Install, and the upgrade should start.