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

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How to Fix APMonUI.dll Missing Error (Solved)

How to Fix APMonUI.dll Missing Error (Solved)

What is APMonUI.dll?

APMonUI.dll, short for Application Monitor User Interface Dynamic Link Library, is a crucial system file in Windows. It plays an essential role in the smooth operation of various applications by providing functionalities and interfaces to other programs. DLL files like APMonUI.dll are shared libraries that can be used by multiple programs to reduce code duplication and improve performance.

Why is APMonUI.dll missing?

The APMonUI.dll file may go missing due to several reasons, including malware infections that delete system files, accidental deletion during disk cleanup or uninstallation of programs, or corrupted system files due to hardware issues or software conflicts.

Step-by-Step Fixes:

Method 1: Reinstall Visual C++ Redistributable

  1. Download the latest version of Visual C++ Redistributable from Microsoft’s official website.
  2. Run the installer and follow the on-screen instructions to complete the installation process.
  3. Restart your computer, and check if the APMonUI.dll error has been resolved.

Method 2: Run SFC /scannow command

  1. Press Windows key + X and select Command Prompt (Admin) or PowerShell (Admin).
  2. Type the following command and press Enter:



    3. sfc /scannow

  3. Wait for the System File Checker to scan and repair any corrupted system files, including APMonUI.dll.
  4. Restart your computer, and check if the error has been resolved.

Method 3: Update System Drivers

  1. Press Windows key + X and select Device Manager.
  2. Expand the category for the device with an exclamation mark (!) or yellow triangle (▾).
  3. Right-click on the device driver and select Update Driver.
  4. Choose Search automatically for updated driver software and follow the prompts to install any available updates.
  5. Repeat this process for all devices with outdated drivers.
  6. Restart your computer, and check if the error has been resolved.

Conclusion

The APMonUI.dll missing error can be frustrating, but with this guide, you’ve learned three effective methods to resolve this issue. By reinstalling Visual C++ Redistributable, running the SFC /scannow command, and updating system drivers, you can help ensure that your Windows system remains stable and functional.

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