Resolving 'd3dcompiler_43.dll is either not designed' Errors in Windows 'Solved'

Introduction

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Are you experiencing a frustrating error message stating 'd3dcompiler_43.dll is either not installed or corrupted' when trying to run an application on your Windows machine? This article will guide you through the process of resolving this issue and getting back up and running.

Causes of 'd3dcompiler_43.dll' Errors

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There are several reasons why you might encounter a 'd3dcompiler_43.dll is either not installed or corrupted' error:

1. Missing D3DCompiler 43: The most common cause of this error is that the necessary runtime files required for Direct3D (DirectX) applications, specifically d3dcompiler-43.exe and d3dcompiler-43_x86.exe/64.exe, are missing from your system.

2. Corrupted System Files: Corruptions or deletions in critical Windows system files can also lead to this error message.

Symptoms of 'd3dCompiler_43.dll' Errors

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If you're experiencing the following symptoms while trying to run an application:

1. An error message appears stating 'The program 'Application Name' has stopped working. A problem caused by d3dcompiler-43.dll and needs to close.'

2. The Windows Error Reporting (WER) window pops up with a similar error description.

Troubleshooting 'd3cDCompiler_43.Dll' Errors

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### Method 1: Manually Download & Install the Latest D3DCompiler Runtime Files

1. Open your web browser and navigate to 'Microsoft's official download page for Direct3D June 2010 redistributable'(https://www.microsoft.com/en-us/download/29b6e36d-7add-bf35-cmdl-f385ffab2369).

2. Click on the correct architecture (32-bit or 64-bit) link depending on your Windows version.

3. Run the downloaded file and follow the installation wizard instructions to install D3DCompiler.

### Method 2: Use a Third-party DLL Repair Tool

1. Download, Install & Scan with 'DLL Fixer'(https://www.dllfix.com/).

2. Follow the tool's prompts to repair or replace any missing or corrupted DirectX-related files, including d3dcompiler-43.exe and its dependencies.

### Method 3: Run System File Checker (SFC) Command

1. Open your Start menu (or start button for Windows XP), type 'cmd' in the search bar, right-click on 'Command Prompt', then select 'Run as administrator'.

2. Type `sfc /scannow` and press Enter to run a full system file scan.

3. Once completed, restart your computer.

Prevention is Key

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To avoid encountering this error again:

1. Always keep your Windows operating system up-to-date by enabling automatic updates from the Control Panel/Settings/Update & Security section.

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By following these simple steps and taking preventive measures, you should be able to resolve any 'd3dcompiler_43.dll is either not installed or corrupted' errors that may arise. If the issue persists after trying all of the above methods, it's always a good idea to seek further assistance from Microsoft support forums or professional tech services for more advanced troubleshooting and resolution options.

Remember: A clean system with up-to-date drivers and runtime components can go a long way in ensuring smooth application performance!

D3dcompiler_43.dll is either not designed