All About LogonUI.exe Error on BOOT/Start up

All About LogonUI.exe Error on BOOT/Start up

LogonUI.exe error on boot/start up is a common issue faced by many Windows users. This critical system process is responsible for the user interface on the login screen and any error related to it can cause disruptions in the normal functioning of the system. These errors can range from minor inconveniences to major system crashes. In this article, we will delve into the details of LogonUI.exe error and its possible causes, along with the steps to troubleshoot and fix it.

FIX: LogonUI.exe Error on BOOT/Start up

FIX: LogonUI.exe Error on BOOT/Start up

LogonUI.exe is an essential Windows process that manages the user login and logout operations. It is responsible for displaying the login screen and performing validations for user credentials. However, sometimes users may encounter an error with LogonUI.exe during the boot process. This error can be caused by various reasons, such as corrupt system files, faulty hardware, or incompatible applications. In this blog post, we will discuss the possible causes of LogonUI.exe errors and provide solutions to fix them.

Cause of LogonUI.exe Error

There are several reasons why you may encounter a LogonUI.exe error on boot/startup. Some of the common causes are:

1. Corrupt system files: System files are essential for the proper functioning of Windows. If these files get corrupted, it can lead to various errors, including LogonUI.exe error.

2. Faulty hardware: Faulty hardware components, such as hard drive or RAM, can also cause LogonUI.exe errors during startup.

3. Incompatible applications: Sometimes, incompatible applications can interfere with LogonUI.exe and cause errors. This usually happens when a new application is installed, and it conflicts with LogonUI.exe.

4. Malware infections: Malware or viruses can also corrupt system files or replace them with malicious files, leading to LogonUI.exe errors.

Fixes for LogonUI.exe Error

Here are some solutions to fix LogonUI.exe errors on boot/startup:

1. Run System File Checker (SFC) Scan

The System File Checker (SFC) is a built-in Windows utility that helps to scan and repair corrupted system files. To run an SFC scan, follow these steps:

Step 1: Press Windows + X keys to open the Quick Access menu and select Command Prompt (Admin).

Step 2: In the Command Prompt window, type the following command and press Enter: sfc /scannow

Step 3: Wait for the scan to complete, and restart your computer.

2. Perform a Clean Boot

A clean boot helps to diagnose and troubleshoot software conflicts that may be causing LogonUI.exe errors. To perform a clean boot, follow these steps:

Step 1: Press Windows + R keys to open the Run dialog box, type “msconfig” and press Enter.

Step 2: In the System Configuration window, go to the Services tab and check the box next to “Hide all Microsoft services.”

Step 3: Click on “Disable all” to disable all non-Microsoft services.

Step 4: Go to the Startup tab and click on “Open Task Manager.”

Step 5: Disable all the startup items one by one, and restart your computer.

3. Run System Restore

If the error started occurring after making changes to your system, such as installing a new application or updating drivers, you can try using System Restore to revert your system to a previous state. To do this, follow these steps:

Step 1: Press Windows + R keys to open the Run dialog box, type “rstrui” and press Enter.

Step 2: In the System Restore window, click on “Choose a different restore point” and select a restore point before the error started occurring.

Step 3: Follow the prompts to complete the system restore process.

4. Scan for Malware

If the above methods do not resolve the LogonUI.exe error, it is possible that your system is infected with malware.


In conclusion, LogonUI.exe errors during boot/start up can be a frustrating and concerning issue for many computer users. However, with the proper knowledge and understanding of this system file, users can take necessary steps to troubleshoot and resolve the error. Whether it is caused by a corrupted file, outdated drivers, or malware infection, there are various methods such as performing a system scan or updating drivers that can help resolve the issue. It is also important to keep in mind that prevention is key, and regularly updating software and performing system maintenance can help prevent such errors from occurring in the first place. By following these steps, users can troubleshoot and resolve LogonUI.exe errors and ensure a smooth start up for their computer.

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