How to Fix mfc120u.dll Missing Error – Step by Step

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How to Fix mfc120u.dll Missing Error (Solved)

How to Fix mfc120u.dll Missing Error (Solved)

What is mfc120u.dll?

mfc120u.dll is a Dynamic Link Library (DLL) file that is part of the Microsoft Foundation Classes (MFC) library. This crucial system component helps in executing various functions within Windows applications developed using MFC. The file assists in managing data structures memory allocation and other essential functionalities.

Why is mfc120u.dll missing?

There could be several reasons why the mfc120u.dll file might go missing on your Windows system such as:

  • Malware Infection: Malicious software may inadvertently delete or corrupt vital system files like mfc120u.dll.
  • Accidental Deletion: The file might have been accidentally removed during a cleanup process or due to an unsuccessful application installation/uninstallation.

Step-by-Step Fixes:

Method 1: Reinstall Visual C++ Redistributable

One way to resolve the mfc120u.dll missing error is by reinstalling the Microsoft Visual C++ Redistributable package which includes the required DLL files. Follow these steps:

  1. Visit the official Microsoft Download Center at this link.
  2. Download and install the Visual C++ Redistributable package that corresponds to your system’s architecture (x64 for 64-bit systems x86 for 32-bit).

Method 2: Run SFC /scannow command

Another solution is to use the System File Checker (SFC) tool to scan and repair system files. Here’s how:

  1. Open Command Prompt as an administrator. To do this search for “cmd” in the Start menu right-click on it and select “Run as administrator”.
  2. Type the following command and press Enter:
    sfc /scannow

The System File Checker will now scan your system for missing or corrupted files and if found attempt to repair them.

Method 3: Update System Drivers

Outdated system drivers might cause compatibility issues with certain DLL files. To ensure your system drivers are up-to-date follow these steps:

  1. Press Windows key + X and select “Device Manager” from the menu.
  2. Find and expand the category for the device you want to update its driver. Right-click on it and select “Update Driver”.
  3. Choose “Search automatically for updated driver software” and follow the prompts provided.

Conclusion:

The mfc120u.dll missing error can be resolved by reinstalling the Microsoft Visual C++ Redistributable package running the SFC /scannow command or updating your system drivers. By following these methods you should be able to fix the issue and restore the functionality of affected applications.

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