On any normal day, you will find your system working well. It boots fine, and you can install desired apps normally. However, sometimes, it can behave unexpectedly. For example, you may see a pop-up with the following error message on your screen when you wake up your computer.
LogonUI.exe – Application Error
The exception Breakpoint. A breakpoint has been reached. (0x80000003) occurred in the application location 0x00007FFC7F84C4D7.
LogonUI.exe is a Windows program responsible for the interface you see on the login screen. It allows a PC to start only when a user enters the correct password and account username associated with the welcome interface. It is an important part of Windows, but it often causes problems such as the one described above. The causative agent of this error is not single but multiple. For instance, the failure of the hard disk, the problems with the RAM modules, the faulty data cables, the power supply unit not being able to supply proper voltage or current to the hard disks, corruption of the user profile, corruption of system files, and more. Nevertheless, you can repair them all.
Since since you cannot boot Windows normally, you may have to try and boot in Safe Mode or into Advanced Startup options screen to be able to carry out the fixes. You will need to make use of the Command Prompt. For some strange reason if you can boot in Safe Mode but cannot access the Advanced Startup Options screen, when in Safe Mode, you may use the Command Prompt to boot Windows directly to Advanced Startup Settings screen. The other option you have ti to use the Installation Media to boot into Windows.
1] Run DISM to repair System Repair
The DISM tool may help you to fix some Windows corruption errors such as LogonUI.exe Application Error in Windows 10. So boot in Advanced Startup Options, access the Command Prompt and then Run DISM to repair Windows System Image. Alternatively, you may boot in Safe Mode access the command prompt and then run DISM.
2] Run Check Disk
Boot in Advanced Startup Options, and then access and open a command prompt and run the following command:
If the above solution fails to resolve the issue, try the next solution.
3] Disable Graphic Card Adapter
The LogonUI error can also occur if there’s any temporary issue with your graphics adapter. To troubleshoot this error, try disabling the graphics adapter in Safe Mode, and then update and enable it normal mode.
4] Troubleshoot in Clean Boot State
A Clean Boot is performed to start Windows by using a minimal set of drivers and startup programs. This process is beneficial in a way that it helps eliminate software conflicts that occur when you install a program or an update or when you run a program in Windows 10. You may troubleshoot the problem by performing a Clean Boot.
5] Repair Windows OS
If nothing helps, you may have to repair Windows OS using the Installation Media.
You may alo check the error log in Event Viewer and see if it gives you a direction to work on.
Post that may help you if your computer does not boot: