The blog of Windows Wally, a Windows Support Technician helping common people solve frustrating computer problems.



How To Fix Cannot Boot Windows LogonUI.exe Error

Reader Question:
“Hi Wally, Please help. It is showing be LogonUI.exe and nothing happens. Windws 10 starts but I can;t work. How do I get past this screen. Thank you. I have attached a snapshot for reference.” – Alexandria N., USA

LogonUI.exe - Cover - Windows 10 - Windows Wally

Before addressing any computer issue, I always recommend scanning and repairing any underlying problems affecting your PC health and performance:

  • Step 1 : Download PC Repair & Optimizer Tool (WinThruster for Win7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.

Setting up weekly (or daily) automatic scans will help prevent system problems and keep your PC running fast and trouble-free.

Wally’s Answer: Few things are as annoying as not being able to follow your routine without interruptions. The LogonUI.exe error appears just when you think Windows has finally loaded and is ready to use. But, don’t worry. We’re here to help you fix this error.

Problem

The computer starts and boots Windows. It gets stuck on and shows the LogonUI.exe error.

Cause

This problem can be caused if the LogonUI.exe file is renamed, moved, or modified.

Solution

Here are some ways to troubleshoot the LogonUI.exe error:

What is LogonUI.exe?

LogonUI.exe is a program in Windows. It makes the login screen appear when Windows starts.

Uninstall or Disable Anti-Virus and Security Software (Temporarily)

Anti-virus and security software can sometimes interfere with the normal workings of Windows. Disabling then might help LogonUI.exe function normally again. You can do this by accessing the Command Prompt.

You can do this by forcing Windows to start Automatic Startup Repair. Please continue reading below.

Use Automatic Startup Repair

You can trigger Automatic Repair by forcing the computer to shut down every time it reaches the Windows logo. Press and hold the power button on the computer until the computer shuts down. Do this 4 to 5 times.

You should see the Automatic Repair options screen.

Access The Command Prompt

From the Automatic Repair screen, click Advanced Options, Troubleshoot, Advanced Options, and then finally Command Prompt.

Run The DISM Command to fix LogonUI.exe

The Command Prompt should open with a black screen and white text on it. Type the following command:

Dism /Online /Cleanup-Image /RestoreHealth

and Press Enter

The DISM Command should find and fix any corrupt file.

Uninstall or Remove Security Software

If you have a login related third-party software installed on your computer then complications related to it might be causing this problem. Since removing software through normal means is not possible, you will need to remove it using the command prompt.

Start the computer in Automatic Startup Repair mode and access the Command Prompt as explained above. After that, type this command:

ren “C:\Program Files” “Program Files-old” 

Press Enter

ren “C:\Program Files (x86)” “Program Files (x86)-old”

Press Enter

Let it finish even if it shows some errors, and then restart the computer.

Now, open the C drive and remove -old from these folders:

Program Files

Program Files (x86)

Also, make sure to uninstall any suspicious security program that might have caused this problem.

Is Your PC Healthy?

I always recommend to my readers to regularly use a trusted registry cleaner and optimizer such as WinThruster or CCleaner. Many problems that you encounter can be attributed to a corrupt and bloated registry.

Happy Computing! :)

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About the Author

Windows Wally is a helpful guy. It’s just in his nature. It’s why he started a blog in the first place. He heard over and over how hard it was to find simple, plain-English solutions to Windows troubleshooting problems on the Internet. Enter: Windows Wally. Ask away, and he will answer.