How To Fix DXDiagn DLL Errors On Your PC – DirectX Error Fix

The dxdiagn.dll errors on your system are caused by the “Microsoft Directx Diagnostic Tool” to aid communication between the graphics card of your computer and your software. If you have errors with this file, it generally means that your PC is either unable to correctly read the dxdiagn.dll file, or has some sort of problem with the settings of Windows.

The errors this file normally causes includes the likes of:

  • “dxdiagn.dll Not Found”
  • “This application failed to start because dxdiagn.dll was not found. Re-installing the application may fix this problem.”
  • “Cannot find C:\Windows\system32\dxdiagn.dll”


The error itself is continually being shown because of the way in which your PC will use “DirectX” to run. DirectX is the central graphics processing facility which all Windows computers rely on to help control a large number of important settings, options and features that various games & softwre use. In short, directx 12 download DirectX is a crucial feature of¬†all¬†Windows systems, and therefore needs to run as smoothly and effectively as possible. DxDiagn.dll is used by DirectX to aid with the communication between your hardware and software, and the cause of the problems you’re seeing is either down to the file being damaged / corrupted, or just missing from your PC.

The way to fix the dxdiagn.dll error is to first re-install or upgrade DirectX. This can be done by downloading the latest update for this software from the Microsoft website (the latest version I believe is 11). This will allow you to install the latest upgrade for the program, which should resolve any potential problems which are inside your system. It’s also recommended that you replace the dxdiagn.dll file which will also be on your PC.

Finally, it’s recommended that you use a “registry cleaner” program to scan through any potential problems that your computer has inside its registry database, and then fix any of the problems that it could have. The registry database is a large selection of settings & options wll Windows computers use to run. Even though the registry keeps everything from your desktop wallpaper to your most recent emails inside, it’s continually causing a large number of DLL errors on your system. A likely reason for the dxdiagn error appearing on your PC is because the register reference for the file is either missing or damaged, preventing your computer from correctly locating it. To fix this problem, you should download a registry cleaner, install it and then let it scan your PC to ensure that no possible problems inside the registry are causing dxdiagn.dll errors.

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