DLL file not found
Description
The application cannot find the required DLL and will not start.
Common Causes
- Missing redistributable packages (VC++, .NET) causing a DLL file to be unavailable.
- DLL file deleted by user or antivirus (false positive detection).
- Malware damaging or deleting system DLL files.
Recommended Solutions
- Solution: Identify the missing DLL — the error message states the DLL file name.
- Solution: Install the appropriate runtime (VC++, .NET, DirectX) based on the DLL file name.
- Solution: Run 'sfc /scannow' to restore deleted system DLL files.
- Solution: Add an exception for the DLL file in the antivirus if it was incorrectly detected.
- Solution: Perform an antivirus scan — malware deleted or damaged the DLL.
Diagnostic Commands
sfc /scannowUnderstanding Severity: Missing Runtime Dependencies
Runtime and library errors prevent applications from launching. Runtime libraries (like Microsoft Visual C++ and .NET Framework) provide pre-written code dependencies that software applications need to function. When these libraries are missing, corrupted, or have version conflicts, Windows cannot load the application, displaying errors about missing DLL files. Resolving runtime library issues involves repairing, updating, or reinstalling the matching redistributable packages.
Safety & Prevention Guidelines
Only download runtime installers and library redistributables from official Microsoft websites. Never download raw DLL files from online DLL repositories. These unofficial files are often outdated, can contain malware, and do not register correctly, which can cause further runtime issues.
Windows Version & Compatibility Notes
Software runtimes must match the architecture of the application. 32-bit programs require the x86 runtime redistributable, while 64-bit programs require the x64 package. Having both architectures installed is necessary for full application compatibility.
Diagnostic Tools & Log Analysis
Use Control Panel's Programs and Features menu to inspect and repair installed runtimes. Use Command Prompt (dotnet --list-runtimes) to check active .NET setups, and dependency walker tools to trace missing DLLs.
When to Seek Professional Hardware Help
If runtime libraries fail to install, or continue to throw error codes during setup, your system likely has corrupted Windows installer services or registry write permission blocks. Run SFC and DISM scans to resolve underlying OS issues.
Frequently Asked Questions
The MSVCR140.dll is a component of the Microsoft Visual C++ Redistributable package. If an application needs this library to run, and the package is missing or corrupted, the program will fail to launch with this DLL error.
Yes, and it is necessary. Different applications are compiled with different versions of Visual Studio (e.g., 2010, 2013, 2015-2022). Having multiple versions of both x86 (32-bit) and x64 (64-bit) installed is normal and required.
The official .NET Framework Repair Tool scans your computer for corrupted .NET installations, resets system services, reregisters runtime files, and fixes registry keys, resolving application startup errors.
Detailed Troubleshooting Guide Available
We have written a comprehensive, step-by-step diagnostic guide covering these types of issues in depth.
Read the PC Runtime & Diagnostic GuideErrorsFixer Technical Team
This troubleshooting guide was reviewed and verified by our hardware diagnostics department to ensure step-by-step resolution accuracy.
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