The logonUI.exe is a windows program that is executed after the boot and it creates the interface for the login. This is system software. It is a part of the Windows Operating System and is maintained by Microsoft Corporation. It is responsible for the login screen interface, thus can cause a severe issue if somehow it gets corrupted or gets interfered with by some malicious programs.
I will cover some basic details about logonUI.exe and methods to fix the error related to it for Windows 10, 8, and 7.
Quick Overivew
Properties
The full name of LogonUI is Windows Logon User Interface Host which is located under C:\Windows\System32 directory. It can also be placed under C:\Windows\WinSxS\ folder in Windows 10.
| File Name: | logonui.exe |
| File Size: | 13.5 KB |
| File Location: | C:\Windows\System32 |
| Publisher: | Microsoft Corporation |
| File version: | 10.0.18362.1 |
| File Description: | Windows Logon User Interface Host |
| Product Name: | Microsoft Windows Operating System |
Uses
The main function of this program is to create an interface that verifies the account username and password entered by a user and allows them to proceed further to the desktop screen only if the credentials are correct. It is a windows pre-installed program that comes with the OS and is an essential part of the system.
Is it safe or a virus?
logonUI.exe is a completely safe and trustworthy application. As it is a windows program it does not harm the computer, on the contrary, a user may get in trouble if the program fails to run correctly. Although, sometimes it can get corrupted due to various reasons and can get infected by some malicious programs.
If you suspect that logonUI.exe on your computer could be a virus,
Errors related to the file logonUI.exe
A user may get a complete black/flashing or strobing screen followed by the error message :
LogonUI.exe – Application Error
“The Exception Breakpoint/A breakpoint has been reached/(0x80000003) occurred in the application at location <Hexadecimal memory address>. Click on OK to terminate the program.”
LogonUI.exe – System Error
“LogonUI.exe system error. The program can’t start because <filename.dll> is missing from your computer. Try reinstalling the program to fix the problem.”
Causes of these errors:
These problems may occur due to the following reasons-
- Internal Error – The files may get corrupted due to an update. System Update or a Driver Update can cause this problem.
- Hard disk failure
- the executable file gets infected by a malware
- Missing or corrupted system DLL files
Effects of error:
A corrupted or infected logonUI.exe causes the following problems-
- Black/flashing or strobing screens during logon
- freezing the mouse completely
These issues force users to only one option i.e forcefully shut down the PC which makes the system unusable.
There are several ways to get rid of LogonUI.exe Application Error that may pop-up during startup. First of all, we will try to enter the desktop for the time being using method 1 below.
Method 1: Accessing the desktop using Ctrl + Alt + Delete
Several users have reported that this method fixed the logonUI.exe error which prevented them from entering the desktop. Although this is a temporary solution, you should use it to enter Windows to scan and repair your PC.
- Press Ctrl + Alt + Delete for 10 seconds
- You will be able to enter the desktop and use your PC
You should use this if you cannot enter your desktop. We recommend using the following steps to fix this error.
Method 2: Using startup repair
1. If you can enter the desktop using the above method, Hold down SHIFT and left-click on the restart to open the Boot options menu
If you cannot enter the desktop, keep restarting your PC 3 times and Windows will automatically enter the Boot options menu
2. Click on Troubleshoot
3. Choose Advanced Options
4. From the Advanced Options menu click on the Startup Repair
5. Let the Startup Repair complete, the system will restart and see if the problem is resolved.
Method 3: Using SFC and CHKDSK
1. From the Advanced Options (check up to step 3 in the previous method) Window, click on the Command Prompt to open up the Windows Command line
2. Type the following commands, execute these commands one at a time, and hit ENTER after each command
sfc /scannow /offbootdir=%systemdrive%\ /offwindir=%systemroot% chkdsk %systemdrive% /f /r /x
Alternatively, you can replace the %systemdrive% by C: (or the current/desired system drive letter)
and %systemroot% by C:\Windows
3. After hitting Enter the prompt will ask you to schedule the scan to the next boot. Press Y and hit ENTER
4. Type exit and hit ENTER
5. Restart the system, the SFC & DSC process will be executed and the problem shall be fixed
Method 4: Disable Graphics card driver and update it
Disabling the graphics card driver has been proved to be useful for some users to fix LogonUI.exe application error:
This method has two parts:
- Disabling graphics card driver in safe mode and
- Updating the driver software in normal boot.
To disable Graphics card driver-
1. Access the Boot options menu as we did in method 2
2. Choose to Troubleshoot and then advanced options
3. Select the option Startup settings
4. Click on Restart and then from the list of options, select Enable Safe Mode (by pressing F4 function key)
5. Your PC will boot up in Safe mode; Now right-click on This PC or My Computer and select Manage
6. Choose the device manager from the side panel and double click on it
7. From the list of devices, select Display Adapter and disable your primary graphics card by right-clicking on it
8. Restart your PC and your Windows should boot up in normal mode.
To update the driver software-
1. After your Windows boots up, again go to Device Manager as you did in the safe mode
2. Double-click on your primary graphics card
3. In the Drivers tab, click on Update Driver and go through the instructions to update the driver software
4. Restart your PC to check if the problem is resolved.
Method 5: Using System Restore feature
1. From the Advanced Options Window in the Boot options menu, click on the System Restore option
2. In the System Restore application Window, click next
3. Click on Finish
4. After the Restore is complete, restart your system and this will fix the system error.
Method 6: Repair the boot sector and disk
1. From the Advanced Options window in the boot options menu, click on the Command Prompt option to open up the Windows Command line
2. Type the following set of commands and execute them :
bootrec.exe /FixMbr bootrec.exe /FixBoot
Execute these commands one at a time and press Enter after each command
3. Now to run DISM (Deployment Image Servicing & Management), enter the following command
DISM.exe /Online /Cleanup-Image /RestoreHealth
If the above commands didn’t work, try the following commands and press ENTER after each
bcdedit /export C:\BCD_Backup c: cd boot attrib bcd -s -h -r ren c:\boot\bcd bcd.old bootrec /RebuildBcd
This will take a few minutes to complete.
4. Exit the command prompt by entering exit command and restart your PC to see if the problem persists.
Method 7: Disabling the other log in options in safe mode
Some devices come with different log in features to make your system more secure, like the fingerprint scanner or facial recognition, PIN. These features can cause issues like logonUI.exe error. In this method, we will disable these features.
First, we need to go into safe mode-
1. Access the Boot options menu
2. Choose Troubleshoot and then advanced options
3. Select the option Startup settings
4. Click on Restart and then from the list of options, select Enable Safe Mode (by pressing F4 function key)
Now we will disable the sign-in features-
1. Press Windows + I to enter Windows Settings
2. Click on Accounts
3. From the side panel, click on Sign-in options
4. You will see various sign-in options, remove every one of them by clicking on it and pressing the remove button (If you are unable to remove one option, it might be your default login option, you should leave it)
5. Restart your PC and Windows will boot in normal mode.
Method 8: Reset your operating system
If none of the methods worked to fix Logonui.exe application error then you should consider resetting your PC. This will freshly install Windows 10 on your device and you can also keep your files and settings intact.
1. Under the Boot options, click on Troubleshoot
2. Click on Reset this PC
3. In the next window, click on keep my files
4. Let the reset process work, this might take a while.
Conclusion
All the above-mentioned steps should be enough to fix the error regarding LogonUI.exe. In case you are still having issues or you have feedback to give, kindly leave a comment down below or contact us.
Other similar files:
igfxtray.exe, Igfxhk.exe, IgfxEM.exe, Hkcmd.exe, nvsvc.exe
После нажатия на кнопку Power на компьютере должна запуститься Windows 10, но вместо этого она может выдать ошибку LogonUI.exe. Сообщение отображается на экране непосредственно перед входом в аккаунт. Чаще всего она блокирует дальнейшие действия с системой. Обычно получить доступ к ОС все же можно, хотя приходится использовать безопасный режим. В других ситуациях без средства восстановления не обойтись, но обо всем по порядку.
Ошибка LogonUI.exe в Windows 10, что делать?
Перед нами системная ошибка, которая непосредственно относится к пользовательскому интерфейсу. Если нажать на Ок в теле сообщения, обычно дальше ничего не происходит. Перезагрузка возвращает к тому же окну. Предлагаем вернуть работоспособность ОС после ошибки LogonUI.exe.
Решение 1: убираем драйвер видеокарты
Метод применим в случаях, когда есть доступ к безопасному режиму для запуска ОС. Чтобы в него войти, нужно нажать F8 на стадии запуска системы.
Инструкция:
- Кликаем ПКМ по Пуску и идем на страницу «Диспетчер устройств».
- Раскрываем список «Видеоадаптеры».
- Жмем ПКМ по названию видеокарты и нажимаем «Удалить».
После этого ОС переключится на использование стандартного драйвера, а проблема может быть исправлена.
Решение 2: запуск без всего лишнего
Если есть доступ к безопасному режиму, предлагаем отключить все лишнее и попробовать запустить систему в обычном режиме.
Инструкция:
- Жмем сочетание Win + R, вводим msconfig и нажимаем Ок.
- Идем на вкладку «Службы», выключаем отображение системных служб и деактивируем остальные клавише «Отключить все».
- Через ПКМ по панели задач переходим в «Диспетчер устройств» и переходим на вкладку «Автозагрузка».
- Выключаем все программы.
- Перезагружаем ПК.
Если все заработало, осталось опытным путем определить проблемный модуль (поочередно включая их и проверяя работоспособность Windows.
Решение 3: запуск ОС в последней удачной конфигурации
Альтернативное решение для тех, кто не может перейти в безопасный режим. ОС хранит параметры предыдущего запуска ОС, в которой все прошло гладко. Нужно только применить эти настройки.
Принцип действий:
- Перезагружаем ПК и жмем на F
- Среди параметров выбираем опцию «Загрузка последней удачной конфигурации».
Решение 4: восстановление запуска
Это встроенный инструмент Windows, который как раз для подобных ситуаций и предназначается.
Инструкция:
- Открываем меню с альтернативными способами запуска (шаг 1 предыдущей инструкции).
- Жмем на вариант «Устранение неполадок компьютера».
- Выбираем режим «Поиск и устранение неполадок», а дальше переходим в «Дополнительные параметры».
- Активируем целевой инструмент «Восстановление при загрузке».
Решение 5: сканируем Windows на проблемы с системными файлами.
С учетом проблемного доступа к ОС, нужно сперва перейти в раздел «Дополнительные параметры» через инструмент восстановления (1-3 шаги выше), а затем перейти в «Командная строка».
Команды для восстановления:
- Вводим sfc /scannow и жмем Enter. Функция проведет анализ системы, что может потребовать немало времени. Она автоматически исправляет неполадки, выявленные в процессе сканирования.
- Применяем команду chkdsk C: /f /r /x. Она отвечает за обнаружение ошибок с диском.
Когда оба действия выполнены, время пробовать запускать ОС в обычном режиме.
Решение 6: восстановление через установочный диск
Принцип аналогичен четвертому методу, но может помочь в тех ситуациях, когда предыдущий способ бессилен. Сперва следует запустить накопитель (через F9 или Boot-меню в BIOS), а следующий этап – в «Дополнительные параметры» выбрать «Восстановление образа системы».
Дополнительные способы исправления
Если не брать в учет сомнительные и практически бесполезные методы, осталось еще пара простых способов восстановления ОС:
- Выключаем защиту учетной записи. Это возможно сделать в безопасном режиме.
- Переключаемся на встроенный графический адаптер. Самый простой способ этого добиться – отключить питание от сети.
- Удаляем приложения Sensible Vision FastAccess и CSR Wireless Stack, они порой вызывают сбои.
- Переустанавливаем Windows 10.
Если уж совсем ничего не помогло, стоит прибегнуть к переустановке ОС. Процедура приведет к потере данных на системном логическом диске, но останется все остальное. Однако, обычно до этого дело не доходит.
This post from MiniTool Partition Wizard introduces some solutions to LogonUI.exe application error which you might encounter at the login screen on Windows 10. Please be patient during the troubleshooting process, as the reasons for this problem could be various and you might need to try these solutions one by one to fix it.
About LogonUI.exe
Before trying the solutions to LogonUI.exe application error, let’s learn about LogonUI.exe at first. LogonUI.exe is a core component of Windows, and it is responsible for building up the logon user interface where you log in to your system. It is a critical process for the Windows operating system, as you will be unable to log in without it.
The genuine LogonUI.exe file should be located in the path C:WindowsSystem32. If you find the LogonUI.exe file in another folder, it should be a virus that is pretending to be a system file and you should remove the virus immediately.
According to the reports, some users have received LogonUI.exe application error at the login screen. The error message prevents them from entering the system and they are even unable to click anything on the login screen.
Don’t worry if you are bothered by the same problem, here are some solutions and you can try them to fix it.
Solution 1: Try Ctrl + Alt + Del
The keyboard shortcut Ctrl + Alt + Del enables you to terminate the unresponsive application. When you receive LogonUI.exe application error, you can try the keyboard shortcut. This might not be a permanent solution, as the mentioned error could appear again the next time you launch your PC.
If Ctrl + Alt + Del doesn’t work in your case, you need to move on to the next method.
Note: As you can’t enter the system due to LogonUI.exe error, you should start your PC in Safe Mode before trying the solutions below. If the login screen is responsive, you can use Shift + Restart, go to Troubleshoot > Advanced options > Startup Settings > Restart, and press F5 to choose Enable Safe Mode with Networking. Otherwise, you need to forcefully shut down the PC 3 times to do it.
Solution 2: Disable Security Programs for Login
Some security programs for facial recognition might be incompatible with Windows 10. If you have installed any software such as FastAccess by Sensible Vision, you might encounter LogonUI.exe error. To solve the problem, you need to uninstall it in Safe Mode. Here are the detailed steps.
Step 1: After entering Safe Mode, press Win + R to invoke Run window. Then type appwiz.cpl in the box and press Enter to view your installed programs and features.
Step 2: Right-click FastAccess or other security software for login and select Uninstall.
Step 3: Follow the onscreen instructions to finish the uninstallation.
Then you can restart your PC to get out of Safe Mode and check if LogonUI.exe error message disappears.
Some users report that LogonUI.exe error could also be related to the PIN login. If you have enabled the service, you can try disabling the PIN in Safe Mode to fix the mentioned error.
Solution 3: Disable Antivirus Software
Third-party antivirus software might also be a reason why you encounter LogonUI.exe error. If you haven’t installed any security programs for login or the second solution doesn’t work in your case, you should disable or uninstall the third-party antivirus software you are using. Then check if the problem has been fixed.
Solution 4: Disable Graphics Card Adapter
Problematic graphics card adapter might also lead to LogonUI.exe error on Windows 10. To fix the problem, you can try disabling the graphics card adapter. Of course, you need to enter Safe Mode at first. Then follow the steps below the disable it.
Step 1: Right-click Start button and select Device Manager.
Step 2: Double-click Display adapter to expand it and view your graphics card.
Step 3: Right-click your graphics card and choose Disable device.
Step 4: In the pop-up window, click Yes to make sure that you want to disable the device.
After that, you can restart your PC. If you can log in and enter the system without LogonUI.exe error, you can open Device Manager and enable the graphics card adapter, and then use the PC as you want.
Tip: You can also try reinstalling the graphics card driver to solve the problem. You just need to uninstall the driver in Device Manager, and then download the latest driver from the website of your graphics card manufacturer. You can also try disabling the Antialiasing-Mode if you are using an Nvidia graphics card.
Solution 5: Run SFC Scan
LogonUI.exe application error could also happen if there are any corrupted or missing system files. In this case, you should Run System File Checker to remove the error.
Step 1: In Safe Mode, Open Run window and type cmd. Then press Ctrl + Shift + Enter to run Command Prompt as administrator.
Step 2: In Command Prompt, input the command sfc /scannow and press Enter.
Then System File Checker will scan your PC and fix the problematic system files. You just need to wait patiently until the process is completed. Then restart the system and try to log in.
If this doesn’t work either, you can try DISM scan which is used to scan and repair Windows 10 image. Please run Command Prompt as administrator in Safe Mode and execute the following command line: Dism /Online /Cleanup-Image /Restorehealth.
How to fix LogonUI.exe error on Windows 10? Here are some solutions.Click to Tweet
Solution 6: Perform a Clean Boot
As mentioned, some third-party security or antivirus software could cause the problem we are talking about. You should know that some other types of applications or services might also be responsible for the issue. To figure out the problematic programs or services, you can perform a clean boot to disable them all and enable them one by one.
Here is the tutorial.
Step 1: Open Run window. Then type msconfig and press Enter to go to System Configuration.
Step 2: Select Services tab, uncheck Hide all Microsoft services, and click Disable all.
Step 3: Switch to Startup tab and click Open Task Manager. In the pop-up window, select each item and click Disable to prevent them from running on startup.
Step 4: Close Task Manager and go back to System Configuration. Then click Apply and OK.
After disabling the applications and services, you can restart the PC. If the LogonUI.exe application error doesn’t pop up, it indicates that one of the disabled services is the culprit of the problem, and you can enable them one by one to find it out.
Then you should keep the problematic service disabled or remove it completely.
Solution 7: Run Startup/Automatic Repair
If you don’t find any problematic applications or you receive the same error in Safe Mode, you can try Automatic Repair. You should enter WinRE by shutting down and restarting your PC three times. Then go to Advanced options > Troubleshoot > Advanced options > Startup/Automatic Repair. When the Startup/Automatic Repair finishes, you can restart the PC and log in.
Tip: You can also use Windows Installation Media to enter WinRE.
Solution 8: Perform System Restore
If you have created a restore point, you can perform System Restore to restore your PC to earlier date, which might be helpful to solve LogonUI.exe error. Please go to WinRE and navigate to Advanced options > System Restore. Then select the administrator account, enter your password, and follow the instructions to complete it and solve the problem.
Solution 9: Reinstall Windows 10
If all the solutions fail to solve LogoUI.exe application error, you might need to reinstall Windows 10. You are recommended to restore the lost data from your system partition and save it to another drive before reinstalling.
For the professional data recovery tool, you can use MiniTool Partition Wizard. Its paid edition provides a bootable media builder feature that allows you to create a burned USB/CD/DVD to boot the problematic PC. Now, let’s see how to recover the data in the system drive.
Step 1: Download and install MiniTool Partition Wizard on another normal PC.
MiniTool Partition Wizard DemoClick to Download100%Clean & Safe
Step 2: Create a bootable USB drive with MiniTool Partition Wizard.
Step 3: Boot problematic PC from the burned USB drive and you will enter the main interface of MiniTool Partition Wizard.
Step 4: Right-click the system partition and select Data Recovery. Then MiniTool Partition Wizard will start scanning your system partition.
Tip: Your system partition might not be assigned with the letter C in the bootable edition of MiniTool Partition Wizard, and please make sure you have selected the right partition.
Step 5: After scanning, you can check the files you need and click Save.
Step 6: Select another drive to save your important files.
Now, you can use a Windows 10 Media Creation tool to reinstall Windows 10. You just need to:
Tip: Alternatively, you can enter WinRE and go to Advanced options > Troubleshoot > Reset this PC to factory reset your PC and solve the problem.
Step 1: Connect a USB drive to another working PC, download the tool, and run it on this PC.
Step 2: Select Create installation media (USB flash drive, DVD, or ISO file) for another PC. Then click Next and follow the onscreen instructions to finish the operation.
Step 3: Boot the PC which you want to reinstall Windows 10 from the USB drive. Then configure your preferences and click Install now.
Step 4: Follow the instruction to reinstall Windows 10. During the processes, several reinstall options will be available, and you can choose to keep your apps and settings or remove all according to your needs.
After reinstalling Windows 10, you should be able to use this PC again.
You can try the solutions in this post to fix the problem if you encounter LogonUI.exe application error on Windows 10.Click to Tweet
Bottom Line
Don’t panic if you cannot log in to Windows 10 due to the LogonUI.exe application error, here are some effective solutions from users and you can also have a try.
If you have better ideas, you can feel free to share them with us by leaving them in the following comment section. If you encounter any issues while using MiniTool Partition Wizard, you can contact our support team via [email protected].
LogonUI.exe Application Error FAQ
How do I go into Safe Mode?
There are many ways you can boot Windows 10 into Safe Mode, such as with the help of Windows Settings, System Configuration, WinRE, etc. For detailed information, you can refer to our previous post: How to Start Windows 10 in Safe Mode (While Booting).
How can I repair my Windows 10?
To repair your Windows 10 while encountering problems, you can try Startup Repair, SFC scan, resetting PC, System Restore, and reinstalling Windows 10. For more solutions, you can check this post: How to Repair Windows 10 for Free Without Losing Data.
How do I restore my computer to factory settings Windows 10?
- Go to Settings > Update & Security.
- Select Recovery and click Get started button under Reset this PC
- Choose Keep my files or Remove everything according to your needs.
- Click Next to continue and follow the onscreen instructions to finish the process.
You would lose data during the process. Therefore, you’d better back up your important files before the factory resettings.
The LogonUI.exe system error is a frustrating issue that can prevent users from accessing their Windows computers. As an IT professional with over two decades of experience, I’ve encountered this problem numerous times and have developed a comprehensive guide to help you understand, resolve, and prevent this error.
1. Introduction to LogonUI.exe
LogonUI.exe is a critical component of the Windows operating system, responsible for managing the graphical user interface during the login process. This executable file is located in the C:\Windows\System32 directory and plays a crucial role in system security and user accessibility.
When functioning correctly, LogonUI.exe allows users to input their credentials and gain access to their desktops. However, errors with this file can manifest in several ways:
- Blank or frozen login screen
- Error messages during the login process
- System crashes or restarts when attempting to log in
- Inability to access the desktop after entering credentials
Understanding the importance of LogonUI.exe is the first step in addressing any related errors effectively.
2. Common Causes of LogonUI.exe System Errors
Several factors can contribute to LogonUI.exe system errors:
Corrupted System Files
System files can become corrupted due to improper shutdowns, malware infections, or software conflicts. When critical files related to the login process are damaged, it can lead to LogonUI.exe errors.
Incompatible or Faulty Security Software
Certain security programs, especially those with facial recognition features, may conflict with the Windows login process. This interference can trigger LogonUI.exe errors.
Graphics Card Driver Issues
Outdated, corrupted, or incompatible graphics card drivers can cause display problems during the login process, resulting in LogonUI.exe errors.
Malware and Viruses
Malicious software can masquerade as legitimate system files, including LogonUI.exe, leading to system errors and security vulnerabilities. In some cases, you might encounter other suspicious processes like toaster.exe, which could be a sign of malware infection.
User Account Corruption
If a user account becomes corrupted, it can prevent the proper functioning of LogonUI.exe, causing login issues.
3. Initial Troubleshooting Steps
When encountering a LogonUI.exe system error, start with these basic troubleshooting steps:
Using Ctrl + Alt + Del Shortcut
Sometimes, simply pressing Ctrl + Alt + Del can interrupt the error and allow you to access the Task Manager or login options.
Booting into Safe Mode
Safe Mode starts Windows with minimal drivers and services, which can help isolate the cause of the problem. To enter Safe Mode:
- Restart your computer
- Press F8 repeatedly before Windows starts loading
- Select “Safe Mode” from the Advanced Boot Options menu
Disabling Security Programs
In Safe Mode, try disabling or uninstalling recently installed security software that might be causing conflicts:
- Open Control Panel
- Go to “Programs and Features“
- Uninstall any recently added security programs
Running System File Checker (SFC) Scan
The SFC tool can repair corrupted system files:
- Open Command Prompt as administrator
- Type
sfc /scannowand press Enter - Wait for the scan to complete and restart your computer
4. Advanced Troubleshooting Techniques
If initial steps don’t resolve the issue, try these advanced methods:
Performing a Clean Boot
A clean boot starts Windows with a minimal set of drivers and startup programs:
- Press Windows + R, type
msconfig, and press Enter - In the System Configuration window, go to the “Services” tab
- Check “Hide all Microsoft services” and click “Disable all“
- Go to the “Startup” tab and click “Open Task Manager“
- Disable all startup items
- Restart your computer
Using Windows Startup Repair
Startup Repair can fix issues preventing Windows from booting correctly. If you don’t have a Windows installation media, you can repair Windows 10 without a CD using built-in recovery options.
Executing System Restore
System Restore can revert your system to a previous state:
- Boot into Safe Mode
- Open Control Panel
- Search for “Recovery” and select “Recovery“
- Choose “Open System Restore” and follow the prompts
Disabling or Updating Graphics Card Drivers
Faulty graphics drivers can cause LogonUI.exe errors:
- Boot into Safe Mode
- Open Device Manager
- Expand “Display adapters“
- Right-click your graphics card and select “Disable device” or “Update driver“
Running DISM Tool
The DISM tool can repair Windows image issues:
- Open Command Prompt as administrator
- Type
DISM /Online /Cleanup-Image /RestoreHealthand press Enter - Wait for the process to complete and restart your computer
5. Preventive Measures
To avoid future LogonUI.exe system errors:
Keeping Windows and Drivers Updated
Regular updates ensure your system has the latest security patches and bug fixes. Enable automatic updates in Windows Settings. If you encounter error 0x80072efe during updates, follow the linked guide to resolve it.
Regular Antivirus Scans
Use a reputable antivirus program and perform regular scans to detect and remove malware that could cause system errors.
Backing Up Important Data
Regular backups protect your data in case of system failures. Use Windows Backup or a third-party solution to create system images and file backups.
Avoiding Unverified Software
Only install software from trusted sources to minimize the risk of malware infections and system conflicts.
6. When to Seek Professional Help
Consider professional assistance if:
- Errors persist after trying all troubleshooting steps
- You need to recover lost data
- You suspect hardware failures
- The issue is beyond your technical expertise
- You encounter complex errors like the System Thread Exception Not Handled error
IT professionals can perform advanced diagnostics, recover data, and address complex system issues more efficiently.
7. Conclusion
LogonUI.exe system errors can be frustrating, but with the right approach, they’re often resolvable. By understanding the causes, following systematic troubleshooting steps, and implementing preventive measures, you can maintain a stable and secure Windows environment. Remember, proactive system maintenance is key to preventing many common computer issues.
8. FAQs about LogonUI.exe System Errors
- Q: Can LogonUI.exe errors be caused by hardware issues? A: While less common, hardware problems like faulty RAM or hard drive issues can contribute to LogonUI.exe errors.
- Q: Is it safe to delete LogonUI.exe? A: No, never delete LogonUI.exe as it’s a critical system file. Doing so could render your system unbootable.
- Q: How can I tell if the LogonUI.exe on my system is legitimate? A: Genuine LogonUI.exe files are located in C:\Windows\System32 and are signed by Microsoft. Use file properties to check the digital signature.
- Q: Can upgrading to a newer version of Windows fix LogonUI.exe errors? A: In some cases, upgrading can resolve persistent issues, but it’s generally recommended to troubleshoot the current installation first.
- Q: How often should I run system maintenance to prevent LogonUI.exe errors? A: Perform basic maintenance like updates and antivirus scans weekly, and more comprehensive checks monthly.
By following this guide, you should be well-equipped to handle LogonUI.exe system errors and maintain a healthy Windows environment. Remember, patience and systematic troubleshooting are key to resolving complex system issues.
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If you’ve been a Windows user for any real length of time, then you’d be familiar with the various internal Windows errors. These errors range from .exe errors to .dll errors, to system errors, etc. Logonui.exe is a Windows service that is also prone to errors, errors that can be somewhat difficult to fix, if you don’t know how. That said, for those of you who’ve arrived on this page, you’re now in good company. Expect to find, a variety of viable fixes for issues related to the logonui.exe file.
Logonui.exe Overview
Logonui.exe is an important Windows executable file, that’s responsible for the user login component of the operating system. Essentially, it’s a system process, which forms the Windows Logon UI (User Interface) Host. The Logon UI is an integral component of Windows, as end users would be unable to log into Windows without it.
Is Logonui.exe Dangerous?
Logonui.exe is a Windows system file, and thus, considered totally safe. There’s little reason to believe this file is causing any harm to your system. That said, the file should be found in the following location:
C:\Windows\System32
If you find it anywhere else, then it’s likely a virus file.
Can You Remove Logonui.exe?
Logonui.exe is an important system process, and thus, should always be active. This process is vital to the smooth operation of Windows. It’s for this reason, it should never be stopped or removed by the end user.
Is Logonui.exe Resource Hungry?
Logonui.exe is considered to be relatively resource hungry. As a result, it may be prudent to monitor its resource usage. You want to ensure it’s not hampering the operating system. If the logonui.exe process is adversely affecting system performance, then you may want to consider disabling unneeded services and modules, using the Microsoft System Configuration Tool.
What Causes Logonui.exe Errors?
On any given day, it’s expected that your system will work without any hiccups. It will boot up fine, and allow you to install any program that you desire. However, there are times when issues can arise. For example, an error message may appear, right after the system finishes booting up. Such an error message may resemble the following:
LogonUI.exe – Application Error
The exception Breakpoint. A breakpoint has been reached. (0x80000003) occurred in the application location 0x00007FFC7F84C4D7.
As I’ve previously explained, the logonui.exe file, is responsible for the login component of Windows, as a result, it determines whether or not an end user can access Windows; as they are requested to provide a working username and password. It’s an integral part of Windows, but not one without its problems.
The general cause of this error varies. With the most common being amongst the following:
- Hard drive failure.
- Damaged or faulty memory (RAM) modules.
- Over utilised power supply unit.
- Corruption of important system files.
Whatever the cause, it’s up to you, to take the necessary steps to repairing the problem.
How to Fix It
In this tutorial, you can expect a wide range of possible fixes to be covered.
That said, the very first thing you’ll want to do. When face to face with the logonui.exe error, is a simple system reboot. If you’re lucky, the error will disappear, and the system will boot in, as if nothing happened.
If you’re still unable to boot into Windows, then it’s recommended that you attempt to access Safe Mode. You can find step by step instructions on how to do that, from my post on fixing 0x800700b7.
Another quick fix solution that you can adopt, is related to the KB3097877 Windows update. It’s a simple matter of uninstalling this update, in order to rectify the error message. To do that, you will need to access Command Prompt. You can find instructions on how to access Command Prompt from my post on fixing Bootmgr Is Missing errors.
Note: If you’re able to boot into Safe Mode, then you should be able to access Command Prompt, by pressing + R, typing cmd and pressing CTRL + Shift + Enter.
From Command Prompt, type the following and press Enter.
wusa /uninstall /kb:3097877 /quiet
If you’re able to boot into Safe Mode, then the easiest and most efficient way of fixing the logonui.exe error is by running Advanced System Repair Pro. Advanced System Repair Pro is a Windows repair tool, capable of scanning, detecting and repairing the integrity of your operating system, using its repository of files to replace missing and/or corrupt system files.
This solution works in most cases where the cause is file corruption. Advanced System Repair Pro will also improve the overall performance of your system.
You can learn more about this powerful tool, and how it can help you, from the following link:
CLICK HERE TO CHECK OUT ADVANCED SYSTEM REPAIR PRO
Use DISM Repair
Logonui.exe errors occur, when the LogonUI program has been corrupted, in some way. Fortunately, there are several methods you can deploy, to rectify this issue.
The first thing you’ll need to do is access Command Prompt, in Safe Mode. The section on How to fix it, covers how to do this.
Depending on whether or not you’re able to access Command Prompt through Safe Mode or a Windows Media Creation CD, once there, you will need to type the following, and press Enter.
Dism /Online /Cleanup-Image /RestoreHealth
If done correctly, Windows will attempt to restore the integrity of your operating system. Once complete, restart your computer to verify whether or not the issue has been resolved.
Uninstall FastAccess
If you have facial recognition software installed on your system, such as FastAccess, then there’s a chance that the logonui.exe error, is being caused by a conflict between the program and your operating system.
To rectify this problem, you will need to uninstall the program. The only way to do that is by entering Safe Mode. Accessing Safe Mode will vary, depending on the circumstances your system is in. The section titled How to fix it, covers exactly how to get into Safe Mode.
From Safe Mode, simply do the following:
1. Press + R, type Appwiz.cpl and click on OK.
2. When Add or Remove Program loads up, simply click on FastAccess, and then click on Uninstall.
3. Follow the onscreen instructions to successfully remove the program. Then restart your system, to verify whether or not the issue has been resolved.
Run Chkdsk
Chkdsk or Check Disk, is a built-in Windows tool, capable of scanning, repairing and recovering data on your hard disc drive. If the logonui.exe is caused by file corruption, then this tool may be able to fix it.
To run this tool, you will need to access Command Prompt, once again. Check out how to fix it, for further instructions.
1. When Command Prompt successfully loads up, type the following and press Enter.
Chkdsk /r
Disable Graphics Card
From people’s experiences with logonui.exe errors, it’s been noted that issues with ones graphics card adapter has been known to cause these errors. In the event that your graphics card is to blame, you can rectify this problem, by doing the following:
1. First, boot into Safe Mode. The section How to fix it, will show you exactly how to do that.
2. From Safe Mode, press + R, type devmgmt.msc, then click on OK.
3. When Device Manager loads up, click on the > icon next to Display Adapters, then right click on your Graphics Card and select Disable device.
4. Next, restart your computer, and it should boot up without any problems.
5. When in Windows, Enable the Graphics Card, by following steps 2 – 3.
Lastly, you may want to consider updating your device drivers, so the logonui.exe error doesn’t re-emerge. To do that, simply navigate to the manufacturer’s official website and download the latest driver(s) you find there.
Alternatively, you can use the automated driver updater tool, DriverFinder. This tool will automate the entire process, behind a couple mouse clicks. With that said, you can learn more about this tool, from the link below:
CLICK HERE TO CHECK OUT DRIVERFINDER
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