avpui.exe Unknown Hard Error when shutting down

Published by Nyau Wai Hoe - Updated on

There is a common problem for Windows 11 and Windows 10 where you might see a weird pop up that says “avpui.exe – Unknown Hard Error” when you try to reboot or shut down your PC. It doesn’t really stop you from rebooting or shutting down though, because if you click OK, the PC will proceed to shutdown.

But the main problem here is a slight delay and the need for you to click on an “OK” before it can shut down. It might also take slightly longer to shut down correctly, like about an extra 30 seconds to finish the entire process. Even though the computer does shut down eventually, seeing this error message again and again can be quite worrying. This guide will show you what you can do to get rid of it.

avpui.exe Unknown Hard Error when shutting down

What actually is avpui.exe?

The file “avpui.exe” is a actually an important part of the Kaspersky antivirus software, mainly for showing you the graphical parts of the program like notifications, settings menus, and security alerts. It helps you interact with the antivirus by working in the background, only becoming noticeable when you use Kaspersky’s features or when there’s a problem, like the “Unknown Hard Error” at shutdown.

What is avpui.exe Kaspersky Antivirus

This file is generally safe. It isn’t bad or a sign of a virus. But, like any computer program, it can have problems for different reasons, and these might cause the error you see when shutting down.

Linked issue: Closing 1 App and Shutting Down in Windows 11/10 (Fix)

Why does avpui.exe cause an unknown hard error during shutdown?

This error usually means there’s a glitch with the avpui.exe file or how it works with your computer system, but it’s not always clear why, which is why it’s called “unknown.” Below are some typical reasons for this problem.

Maybe conflicting with other software

If other programs clash with avpui.exe, this can cause errors. These conflicts often happen when your computer is trying to shut down and different programs are trying to close at the same time.

Also see: Sihost.exe, Ctfmon.exe or Explorer.exe Unknown Hard Error

The file might be corrupted

avpui.exe or related system files might get messed up because of bad software updates, crashes, or viruses.

Kaspersky outdated?

Using old versions of Kaspersky antivirus or your operating system can cause problems that show up as errors when you shut down.

Problems with the OS

Or it could be a sign of bigger problems, like messed up Windows files or registry issues.

This “Unknown Hard Error” is just a way for Windows to say, “Hey, something’s wrong with avpui.exe, but I’m not sure what.” Figuring out the exact problem can sometimes be difficult, but knowing these common causes should give you some clues.

Related resource: What is avp.exe (Kaspersky) & its High CPU and Disk Usage

How to get rid of the “avpui.exe – Unknown Hard Error” pop-up during shutdown

The following are some solutions you can try to fix the “avpui.exe Unknown Hard Error” on your Windows 10 or Windows 11 computer.

Update Kaspersky Antivirus and Windows

Make sure your antivirus and operating system are up to date. Updates often fix known issues and compatibility problems.

Update avp.exe Kaspersky Antivirus

Reinstall Kaspersky Antivirus

Removing and reinstalling Kaspersky can solve problems with bad installation files.

Reinstall Kaspersky Free Antivirus

Scan for malware with another tool

Use a different malware scanner to check for and get rid of any viruses.

Windows Security Defender Full Scan

Run System File Checker (SFC)

Use the System File Checker tool to fix possibly damaged system files. Open Command Prompt as admin and type sfc /scannow, then hit Enter.

SFC scannow successful repair Windows 11

Check for software conflicts

Look for other software that might be causing problems with Kaspersky.

Switch to a different antivirus solution

If nothing else works, trying a different antivirus might help find out if the issue is just with Kaspersky.

Bitdefender antivirus Windows 11

If these steps don’t help, you might want to use the Event Viewer in Windows to get more details about what’s going wrong.

Can you just leave it alone?

If the “avpui.exe Unknown Hard Error” only shows up once in a while and doesn’t really affect anything other than making shutdown a bit slower, you might not need to worry about it too much. Computers can sometimes have small glitches that don’t really harm their overall performance.

But if this error keeps bothering you or if you think it might be causing other more serious problems that you just couldn’t ignore, switching to a different antivirus should solve the problem and give you some peace of mind.

Whether or not you take action depends on how often this error actually happens and how it affects your computer. If it’s popping up very rarely, you can usually ignore it. But if it’s starting to cause some concerns and other issues, you might want to fix it.

Nyau Wai Hoe
Nyau Wai Hoe is the Founder and Chief Editor of WindowsDigitals.com. With a degree in software engineering and over 12 years of experience in the tech support industry, Nyau has established himself as an expert in the field, with a primary focus on the Microsoft Windows operating system. As a tech enthusiast, he loves exploring new technologies and leveraging them to solve real-life problems.

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