How to Fix Windows.UI.Logon.dll Missing Error – Step by Step

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How to Fix Windows.UI.Logon.dll Missing Error (Solved)

How to Fix Windows.UI.Logon.dll Missing Error (Solved)

What is Windows.UI.Logon.dll?

Windows.UI.Logon.dll is a Dynamic Link Library (DLL) file that plays a crucial role in the operating system’s user interface particularly during the login process. This file helps to manage the graphical user interface when users log into their Windows accounts.

Why is Windows.UI.Logon.dll missing?

There are several reasons why you might encounter a missing Windows.UI.Logon.dll error such as:

  • Malware infection: Malicious software can corrupt or delete essential system files including DLLs like Windows.UI.Logon.dll.
  • Accidental deletion: In some cases users may accidentally delete the file while performing system maintenance tasks.

Step-by-Step Fixes:

Method 1: Reinstall Visual C++ Redistributable

The Windows.UI.Logon.dll file is associated with Microsoft Visual C++ Redistributable. To resolve the issue reinstalling this package may help:

  1. Visit the official Microsoft Download Center at this link.
  2. Download the appropriate version of Visual C++ Redistributable for your Windows operating system and architecture.
  3. Run the installer and follow the on-screen instructions to complete the installation process.

Method 2: Run SFC /scannow command

System File Checker (SFC) is a built-in Windows tool that scans for and repairs corrupted system files. Running the SFC scan can help fix issues with missing DLLs:

  1. Open Command Prompt as an administrator by searching for “cmd” in the Start menu right-clicking on “Command Prompt” and selecting “Run as administrator.”
  2. Type the following command and press Enter:
sfc /scannow

The SFC scan may take several minutes to complete. Once it’s finished restart your computer and check if the error persists.

Method 3: Update System Drivers

Outdated system drivers can cause compatibility issues with various components including DLL files like Windows.UI.Logon.dll. Updating your system drivers may help resolve the error:

  1. Press the Windows key + X and select “Device Manager” from the menu.
  2. Expand the category for the device you want to update by clicking on it.
  3. Right-click on the device and select “Update driver.”
  4. Choose “Search automatically for updated driver software” and follow the on-screen instructions.

Conclusion

By following the methods outlined in this guide you should be able to resolve the Windows.UI.Logon.dll missing error on your Windows system. If none of these solutions work consider seeking professional assistance or consulting Microsoft Support for further troubleshooting options.

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