Understanding msvcr120_app.dll

Modern Windows applications rely heavily on various dynamic link libraries (DLLs) to deliver robust functionality without reinventing the wheel for every project. One such crucial file is msvcr120_app.dll, which often becomes a talking point when users encounter related errors. Understanding what this file is, why errors occur, and how to resolve them is essential, especially for users running software that depends on Microsoft Visual Studio's programming libraries.

Reasons Behind msvcr120_app.dll Issues

DLL files, including msvcr120_app.dll, are shared pieces of code that multiple programs can use to carry out standard tasks—in this case, tasks related to runtime functions of programs developed in C and C++ with Microsoft Visual Studio 2013. The "120" in the name denotes version 12.0, aligning with Visual Studio 2013. When you see errors indicating a missing or corrupted msvcr120_app.dll, several underlying causes could be responsible:

• Missing Visual C++ Redistributable: The most common reason is that the Visual C++ Redistributable for Visual Studio 2013 is either not installed or has become corrupted, meaning programs cannot access the DLL.
• Corrupt or Deleted DLL File: The file might have been accidentally removed or corrupted by user actions, misbehaving applications, or malware.
• Outdated Software: Certain applications might require the latest version of the DLL, which is not present on your system due to outdated installations.
• Registry Issues: Problems in the Windows registry can cause the system to lose track of the DLL’s location, leading to load failures.
• Malware Infection: Some viruses target DLL files for deletion or corruption to destabilize system security and performance.
• Incomplete Software Installations: Sometimes, when installations or updates are interrupted, necessary files like msvcr120_app.dll don’t get copied correctly.

Understanding these root causes is vital for choosing the correct solution and ensuring the same problem does not recur.

How to Fix msvcr120_app.dll Errors

There is no one-size-fits-all solution for msvcr120_app.dll errors, but a systematic approach can resolve the majority of issues. Here is a step-by-step guide you should follow:

1. Restart Your Computer

   This may seem basic, but sometimes rebooting your system can fix temporary problems related to DLL loading or file access.

2. Reinstall the Visual C++ Redistributable for Visual Studio 2013

   The most reliable fix is to download and install (or repair) the official Microsoft Visual C++ Redistributable package corresponding to Visual Studio 2013. This package contains the required msvcr120_app.dll file.

   • Go to the Microsoft Download Center.
   • Download the package for your system (x86 for 32-bit, x64 for 64-bit).
   • Run the installer. If prompted, choose "Repair" to fix an existing installation or proceed with a fresh install.
3. Update the Affected Application

   If only one program displays the error, uninstall and reinstall that specific app. Developers often update their software to include necessary dependencies or fix incompatibilities with new Windows updates.

4. Perform a System File Check

   Corrupted system files may cause DLL issues. Use the built-in System File Checker:

   • Press Win + X and select "Command Prompt (Admin)" or "Windows PowerShell (Admin)".
   • Type sfc /scannow and press Enter.
   • Let the scan complete and follow any prompts to repair errors.
5. Check for Windows Updates

   Microsoft frequently releases updates that fix compatibility issues. Open "Settings" > "Update & Security" and look for available Windows Updates.

6. Scan for Malware

   Run a thorough scan with Windows Defender or a trusted third-party antivirus. Quarantine or remove any detected threats.

7. Avoid Downloading Standalone DLL Files

   Numerous websites offer individual DLL downloads, but these may include outdated or malicious versions. Always obtain DLLs through official Microsoft channels or trusted software providers.

8. Restore DLL from the Recycle Bin or Backup

   If you suspect deletion, check the Recycle Bin. If you regularly back up your files, restore msvcr120_app.dll from the appropriate backup.

9. Repair Windows

   For persistent issues, consider using the "Reset this PC" or "System Restore" features within Windows to revert to a time before the problem occurred.

Conclusion

msvcr120_app.dll is a vital component for running many modern applications on Windows—particularly those built with C or C++ in Microsoft Visual Studio 2013. Errors relating to this DLL can stem from a missing or corrupted redistributable package, malware, outdated or incomplete software installations, or even deeper system issues. Fortunately, most problems can be resolved by reinstalling the Visual C++ Redistributable for Visual Studio 2013, updating your applications and operating system, and making sure your computer is free from malicious software. By following a systematic approach to troubleshooting, you can restore your system to proper working order, ensuring that all software depending on msvcr120_app.dll runs smoothly and securely.