Fix: Avast Antivirus Issues in Windows 10

By: Marian Cularea
5 minute read
fix avast antivirus issues

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Have you tried to install Avast Antivirus on your new Windows 10 computer? Sometimes users may encounter some serious issues with the Avast software Windows 10.

The most annoying of them being the fact that Avast does not recognize the Windows system files as part of the operating system and tries to delete them.

This article will show you how to fix Avast issues on Windows 10 and what version of the antivirus to install.

avast fix

Avast is one of the most popular antivirus programs out there. Many users who were using Avast on previous versions of Windows installed it on Windows 10, as well — some of them change their mind and switched to Windows Defender, but that’s a story for another day.

But even if Avast Antivirus is fully-compatible with Windows 10, some errors may still occur. In this article, we’ll list the most common issues reported by users as well as their corresponding solutions.

Follow the instructions listed below. We hope these solutions will be helpful to you.

How to fix Avast Antivirus Problems in Windows 10

  1. Windows 10 Action Center Doesn’t Recognize Avast
  2. Avast Causes Black Screen in Windows 10
  3. ‘Process Trust’ Error During Avast Installation
  4. Avast Antivirus won’t update
  5. Avast won’t start

Case 1 – Windows 10 Action Center Doesn’t Recognize Avast

One of the most frequent issues with Avast on Windows 10 is when the Action Center doesn’t recognize Avast. If that happens, you’ll probably receive pop-up messages in the down right side of your screen saying something like “Windows Defender and Avast Antivirus are both turned off,’ or ‘Windows did not find an antivirus program“. Fortunately there’s an easy solution for this, you just need to follow the steps below.

First things first, we’re going to try to disable Avast Antivirus and than re-enable it  in order to force Windows 10 to recognize it:

  1. Right-click on Avast icon in your taskbar
  2. Go to Shields control and choose Disable for 10 minutes
  3. After that, enable it again the same way, and selecting Enable all shields

This should help Windows 10 recognize Avast, and the above-mentioned messages shouldn’t bother you anymore. But if the issue is still present, you have one more option to try. Here’s exactly what you need to do:

  1. Right-click on the Start Menu and choose Command Prompt (Admin)
  2. In the Command Prompt type winmgmt /verifyrepository > hit Enter. avast antivirus windows 10
  3. If you get ‘WMI repository is consistent -no problems detected,’ type ‘winmgmt /resetrepository’ and press Enter.
  4. If you get ‘WMI repository is inconsistent -problems detected,’ type ‘winmgmt /salvagerepository’ and press Enter.
  5. If you get ‘WMI repository has been salvaged – WMI repository has been successfully rebuilt,’  continue to the last step.
  6. Now reset your computer.

Case 2 – Avast Causes Black Screen in Windows 10

Some users also reported that installing Avast on Windows 10 caused black screen issues. This is not a common issue, but if you experienced it, you can try the following solution:

  1. Click on Avast icon in the taskbar and open Avast user interface
  2. Go to Settings tab, and then to General
  3. Go to Exclusions options, click add and add the following address to exclusions:
    • C:WindowsExplorer.exe,’ and ‘C:WindowsImmersiveControlPanelSystemSettings.exe
  4. Restart your computer.

After that, you shouldn’t face the black screen issue anymore. But if you do, maybe the problem is not related to Avast, so I recommend you to check our article on how to fix screen problems in Windows 10 for additional solutions.


Case 3 – ‘Process Trust’ Error During Avast Installation

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This error message sometimes appears when you’re trying to install Avast on Windows 10. Namely, you’ll get ‘Process Trust’ fatal error pop-up message saying ‘Avast doesn’t trust Avast Installer’. This means that you cannot install Avast on your computer.

This error appears due to a conflict between Avast and your current antivirus program. So, just disable your current antivirus (in most cases this is Windows Defender) and try to install Avast again. This time, you shouldn’t experience any problems. This error will remind you that having two antivirus programs installed on your computer is not a good thing.


Case 4 – Avast Antivirus won’t update

Sometimes, Avast may fail to update its virus definitions. This is quite a major issues since it leaves your computer vulnerable to the latest threats.

If you can’t install the latest Avast updates, follow the suggestions listed below:

  1. Update your OS — running outdated Windows versions may prevent other apps and programs from running properly. Go to Settings > Update & Security > Windows Updates > check for updates.check for updates
  2. Temporarily disable your firewall/ VPN. Sometimes, your firewall may prevent you from installing the latest software updates on your machine. Go to Start > type ‘firewall’ > double click on ‘Windows Firewall’. Click on the option ‘Turn Windows Firewall on and off’ > turn off firewall protection.windows firewall disable
  3. Clean boot your computer. This solution allows you to start Windows 10 using a minimal set of programs and drivers. Software conflict may also block Avast updates. This workaround helps you eliminate software conflicts as a potential cause for this problem. Here are the steps to follow:
    • Type System Configuration in the search box > hit Enter
    • On the Services tab >  select the Hide all Microsoft services check box > click Disable all.
    • On the Startup tab > click on Open Task Manager.
    • On the Startup tab in Task Manager > select all items > click Disable.disable startup programs
    • Close the Task Manager.
    • On the Startup tab of the System Configuration dialog box >click OK.
    • Restart your computer and try to update Avast.

Case 5 – Avast won’t start

If Avast fails to load, you can try to repair the software. Go to Start > type ‘control panel’ > launch Control Panel > go to Programs > Uninstall a program >  Select Avast > Select Repair.

repair avast windows 10

When the process is completed, you can restart your computer and check if the issue persists.

If Avast still won’t open, you can also use the solutions suggested to fix Avast update issues.

That’s all, I hope this article covered all the major Avast errors that you may get in Windows 10, and that it helped you solve them, as well.

Also if you have additional questions regarding this subject, drop up a line in the comments section below and we will help you further as soon as possible.


Editor’s Note: This post was originally published in March 2015 and has been since completely revamped and updated for freshness, accuracy, and comprehensiveness.


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