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Home » Troubleshoot: LogonUI.exe Application Error – Windows 11 & 10

Troubleshoot: LogonUI.exe Application Error – Windows 11 & 10

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LogonUI.exe is a critical component of the Windows 11 operating system responsible for managing the graphical user interface during the login process. When LogonUI.exe encounters errors or issues, it can lead to login problems, system instability, and various other complications. If you’re currently facing LogonUI.exe errors on your Windows 11 system, this comprehensive guide will assist you in troubleshooting and resolving this issue effectively.

Before we delve into the troubleshooting steps, it’s essential to take precautionary measures. Create a backup of your important data and establish a system restore point. This ensures that you can easily revert your system in case any complications arise during the troubleshooting process.

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Indeed, the “LogonUI.exe: Application Error” is a critical Windows issue that disables the login screen, preventing users from accessing their Windows accounts. This error can occur for various reasons, including:

  1. Corrupted System Files: Damage to essential system files can disrupt the LogonUI.exe process.
  2. Missing DLL Files: The absence of necessary Dynamic Link Library (DLL) files can lead to this error.
  3. Graphics Driver Issues: Malfunctioning or incompatible graphics drivers can interfere with the LogonUI.exe operation.
  4. Interrupted Update Installation: If a Windows update installation is interrupted or incomplete, it can result in this error.
  5. Improper System Shutdown: Sudden power failures or system crashes during shutdown or startup processes can lead to corruption in critical system files, including LogonUI.exe, resulting in the error.
  6. Virus/Malware Infection: If your Windows system is infected with a virus or malware, these malicious programs can target and damage essential system files like LogonUI.exe, ultimately preventing users from logging in.
  7. Incompatible Drivers and Software: Installing drivers or software that are not compatible with your system can trigger LogonUI.exe errors.

Taking these factors into account is essential when diagnosing and troubleshooting the “LogonUI.exe: Application Error.” Effective resolution often requires a multi-faceted approach that considers various potential causes and solutions.

Now, let’s explore the steps to resolve LogonUI.exe errors on Windows 11.

Solution 1: Try Safe Boot

When faced with a LogonUI.exe error, accessing the Windows login screen in normal mode becomes challenging. To address this issue, you can utilize Safe Boot mode for logging in and then proceed with the necessary repair steps.

Open PC in Safe Boot Mode
Step 1: Boot your PC using the Windows Installation media. It will open Windows Installation Wizard. Click Next.

Windows Installation

Step 2: Select Repair your computer.

Install Windows - Step 2

Step 3: It will open the Advanced Startup Option or Windows Recovery Environment. Go to Troubleshoot

Troubleshoot in Advanced Startup Menu Windows 10 & 11

Step 4: Select Advanced options

advanced option windows 10 & 11

Step 5: Select Startup Settings


Step 6: Click on Restart button to enable safe mode.

Step 7: Once you boot your computer in Safe mode, uninstall the recently added games, drivers, and softwares.

Perform the following troubleshooting steps in Safe Boot Mode.

1. Run System Repair Command

SFC/Chkdsk/Dism - Step by Step
Step 1: Open Command Prompt as Administrator.

open command prompt as administrator in Windows 8, 10 & 11

Step 2: Now run the following commands one by one.
i. System File Checker tool

sfc /scannow

ii. Run Dism command

Dism /Online /Cleanup-Image /CheckHealth
Dism /Online /Cleanup-Image /ScanHealth
Dism /Online /Cleanup-Image /RestoreHealth

iii. Run Disk checking utility.

chkdsk /f c:

It will show you message:

Chkdsk cannot run because the volume is in use by another process. Would you like to schedule this volume to be checked the next time the system restarts? (Y/N)

Press Y and Press Enter. The disk checking will start on next pc start.

2. Remove unused apps and drivers.

Uninstall Program

Step 1: Open Control Panel. Type “Control” in the Run Dialog box and press Enter.

Step 2: Click on the “Uninstall Program” under the “Programs” section.

Step 3: Right-click on the unused or infrequent apps and select Uninstall.

3. Update Driver

Update Driver - Step by Step
Step 1: Open Device Manager. Press Windows Key + X and click on Device manager.
Open Device Manager
Step 2: Look for driver which has yellow exclamation mark or warning on it.
Open Device properties
Step 3: Double click on the driver to open Properties. Go to Driver tab and click to Update Driver button.
Update driver
Step 4: Select “Search automatically for drivers”.
search automatically for drivers
Step 5: Follow the instructions and completes the process.
Step 6: If you get the “Windows was unable to install your driver” message, use another effective third-party tool to update/install all your driver.
Windows was unable to install your device

4. Windows Update Full

Complete Windows Updates - Step by Step

1. Windows Updates

Step 1: Right-click on Start → Settings.

open windows 11 settings

Step 2: Scroll down to find Windows updates and then click on Check for updates.


2. App Update

To update the installed application on your computer, you can follow the following steps.

Step 1: Open Microsoft Store. Click on your profile picture at the top of the MS Store and select Settings.

Open MS Store Settings

Step 2: Turn On App Updates.

Turn on Auto App Updates

Step 3: Open Microsoft Store Library. To access your Microsoft Store Library, simply click on the library icon located on the left sidebar. Once there, you’ll find a button labeled “Get updates.” Click on this to initiate a scan for the latest updates available for the apps you have installed.

Step 4: For the third-party application, check for their updated version on their official site and install them.

3. Driver Update

Step 1: Open Device Manager. Right-click on the Start menu and select Device Manager.

Open Device manager

Step 2: Expand all the drivers manually and look for the driver with a yellow exclamation mark. Right-click on it and select Update.


5. Disable Graphics Card

Disable/Uninstall Graphics Driver

Step 1: Open Device Manager. Right-click on the Start menu and select Device Manager.

Open Device manager

Step 2: Expand Display adapters. Select the Graphics card, right-click on it, and select Disable device or Uninstall device.

Solution 2: Perform System Restore

Utilizing the System Restore feature can often prove to be a reliable solution for reverting recent changes in Windows and eliminating critical errors such as “LogonUI.exe: Application Error”. To perform a system restore, follow these steps:

System Restore - Steps by Steps
Step 1: Open the Advanced Startup Option or Windows Recovery Environment. Go to the Troubleshoot ➜ Advanced options ➜ System Restore.


Step 2: Click Next and then Select Date.

select system restore from the list

Step 3: Click on Finish to start Restoring process.

Solution 3: Perform Startup Repair

Within the Windows Recovery mode, you’ll encounter an option labeled as “Automatic Repair” or “Startup Repair.” This feature is designed to scan Windows for startup-related issues and attempt to repair them. To initiate the Startup Repair process, follow these steps:

Startup Repair - Step by Step
Step 1: Boot your PC using the Windows Installation media. It will open Windows Installation Wizard. Click Next.

windows os installation

Step 2: Select Repair your computer.

repair your computer option windows 10 & 11

Step 3: It will open the Advanced Startup Option or Windows Recovery Environment. Click on the Troubleshoot.

Troubleshoot in Advanced Startup Menu Windows 10 & 11

Step 4: It will open the Advanced startup menu. Go to the Troubleshoot ➜ Advanced options ➜ Startup Repair.
Startup Repair Windows 10 & 11
Step 5: Select OS.
Startup Repair - Select OS
Step 6: Wait until it diagnoses and repairs your PC.

Solution 4: Disconnect external peripherals.

It’s important to note that “LogonUI.exe: Application Error” issues can also be triggered by faulty external devices. Therefore, it’s essential to disconnect all external peripherals from your computer and then reboot it to observe any changes in the situation. This step can help isolate the problem and identify whether the error is related to external hardware.

How to prevent this error in the future

It’s also essential to frequently maintain your PC to prevent future occurrences of this Error. Manually managing every aspect of the Windows OS can be time-consuming and complex. To streamline this process, it is highly recommended to employ a dependable PC Optimization Tool. Such tools can efficiently optimize, secure, and keep your PC up to date, ensuring its long-term health and performance.

3 Steps to Fix this Error
Step 1. Download Outbyte PC Repair Tool [File Size: 16.4 MB]
Step 2. SCAN your Windows PC
Step 3. Click Fix button to Repair Error


The ‘LogonUI.exe: Application Error‘ is a critical Windows error that disables the login window, preventing a user from logging into their Windows account. This error can occur due to several reasons, including corrupted system files, missing DLL files, malfunctioning graphics drivers, interrupted update installations, and the installation of incompatible drivers and software, among others.