The D3dx9_31.dll file is a component file of DirectX application version 9. It is operated by Windows to start DirectX processes for games and multimedia applications that use DirectX software. This particular file mainly shows errors on the screen when the system is unable to read the file. The cause of this could be file damage or corruption. You’ll need to troubleshoot possible issues that are causing the error. The tutorial below will be your guide on how to fix the problem and remove the error for good.
What Causes D3Dx9_31.dll Error
There are several possible reasons for this error:
- The file cannot be used due to damage, so the system generates errors one after another.
- The error could simply appear because the version you are running is no longer the updated version of DirectX.
- The registry could be experiencing issues that are causing the errors.
The usual message that appears is this: “Fatal Exception Error in dplayx.dll”gold “dplay.dll has performed an illegal operation“. At other times, the message will say that the “dinput9.dll can’t be started or there were problems accessing the DirectX D3D8.DLL file.”
The tasks that we need to perform to fix the problem are to update the latest version of DirectX, find the missing file and clean the registry. Many recently released games and multimedia software work only with the latest DirectX 9 settings; therefore, if you try to run them with the older version, you will see error messages appear on the screen. If this happens, you will not be able to run the games etc.
How to Fix Common D3Dx9_31.dll Errors
The best solution (first task) is to get the latest version of Direct X by downloading it and then installing it on your hard drive. If you are not sure which version you have installed, you can check by going to START > RUN and type “dxdiag” in the box; press the ENTER key. This will open the Diagnostic Tool which can identify what version of Direct X is on your PC. If you don’t have the latest version, please log in to the official website and download the program. Install correctly.
Next, if you still experience the error, then the problem might be with the file itself. If it is damaged or missing then you need to replace it. In this way, the computer system can have a functional file. Just download the dxdx9_31.dll file from the official Direct X website. Save it to your hard drive and find the old dxdx9_31.dll file in the c:WindowsSystem32 folder. Rename it as dxdx9_31BACKUP.dll. Then put the new file in the system folder. Register it by opening the prompt (START>RUN> “cmd”> ENTER). At the command prompt screen, type regsvr32 dxdx9_31.dll. Restart your computer. If the error is still there, go to the next task.
Finally, download Frontline Registry Cleaner, install and run it. It is a highly effective tool that will work as a repair kit and will maintain the registry database, where many problems come from. It will identify errors, correct them and keep the database running smoothly. This will fix most errors effectively.