Fix Avast won’t open and other errors in Windows

Find out how to fix Avast failing to open and other issues

Avast is a popular free antivirus program designed to protect your PC from viruses and other malicious applications. Avast Antivirus was developed by Avast Software, a multinational cybersecurity software company based in Czechia. It’s a multi-platform antivirus solution for Microsoft Windows, macOS, Linux, Android, and iOS. Avast holds the second largest market share among antivirus software vendors worldwide as of April 2020.

Today, Avast has more than 435 million active monthly users. It’s an industry heavyweight for sure, but even with all its resources, the application still has its shortcomings as sometimes it doesn’t work right or fails to start entirely. However, before we get into how to fix Avast, let’s look at what it offers and make fixing it worthwhile.

avast-logo

Avast is a great multi-platform antivirus application that you can install on your personal computer or mobile device. It protects your device from cyber-security threats such as spyware, ransomware, keyloggers, and other malware types. Furthermore, Avast is excellent for cleaning unwanted junk files and remnants of potentially malicious software.

Furthermore, Avast offers some nifty features that include but are not limited to web threat scanning, browser protection, secure two-way Firewall, webcam protection, secure password vault, anti-phishing protection, ransomware protection, file shredder, and a cloud management console. Avast is sold on a freemium model, so its basic features are free, but advanced features are available only if you buy Avast’s premium version. Nevertheless, the free version is sufficient for most users looking to protect their machines and have peace of mind while browsing the web or performing work on their computers.

While Avast provides robust antivirus protection, Windows 10 users sometimes experience some issues, such as Avast failing to start and errors, such as causing black screens and failing to install or update. Worst of all, sometimes, Avast identifies Windows 10 system files as malicious and tries to delete them.

Also, in some cases, Windows 10 Action Center fails to recognize Avast, and you may get a pop-up message saying “Windows Defender and Avast Antivirus are both turned off” or “Windows did not find an antivirus program”.

Another commonly reported problem with Avast is the BSOD (Blue Screen of Death) error that occurs after installing the latest Windows 10 version. Apparently, incompatibility between Avast and some CPU models is the cause of this error. A useful rule of thumb is to update Avast to the latest version before upgrading your PC to the latest version of Windows.

In some cases, Avast might stop working on account of corrupted files. So the first thing you should do is run Avast’s repair wizard. Other times Avast may run but not work correctly, which indicates that there are problems with its main service. It would help if you tried to restart the application. If that doesn’t work, then you should try other methods to fix it. We’ve made several guides that might help you fix Avast’s various issues, such as it failing to launch.

Table of Contents:

How to fix Windows 10 failing to recognize Avast

Option 1. Temporarily disable Avast Antivirus

Right-click the Avast icon on the taskbar

1. Right-click Avast’s icon on your taskbar.

Disable Avast shield control

2. Go to Avast Shields control and click Disable for 10 minutes.

Confirm the action by clicking OK STOP

3. Confirm the action by clicking OK, Stop.

Enable Avast shields control

4. Then, re-enable Avast Shields control.

5. Right-click Avast’s icon on your taskbar again. Go to Avast Shields control, and click Enable all shields.

Now Windows 10 should recognize Avast, but if the issue persists, there is another fix you can try.

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Option 2. Verify WMI repository

Open the Command prompt

1. In the Taskbar search box, type CMD.

2. Right-click the Command prompt result and click Run as administrator.

Verify WMI repository

3. In the Command prompt window, type winmgmt /verifyrepository and press the Enter key.

4. If it says WMI repository is consistent, type winmgmt /resetrepository, and hit Enter.

5. However, if it says WMI repository is inconsistent, type winmgmt /salvagerepository, and hit Enter.

6. If it says WMI repository has been salvaged – WMI repository has been successfully rebuilt, then reboot your PC and your system should recognize Avast.

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How to fix Avast causing a black screen in Windows 10

Click Avast's Menu button

1. Click Avast’s icon to open its user interface.

2. Click the Menu button.

Go to the Exceptions menu

3. Go to Settings and click Exceptions in the general tab.

4. Click Add Exception.

Add Explorer.exe to exceptions

5. Type C:\Windows\Explorer.exe and click the Add Exception button.

Add SystemSettings.exe to exceptions

6. Then, click the Add Exception button again and type C:\Windows\ImmersiveControlPanel\SystemSettings.exe and click the Add Exception button.

7. Reboot your PC.

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How to fix Avast failing to update

Option 1. Update Windows 10

Go to Check for Updates

1. In the taskbar search bar, type Check for Updates and click the result.

Click the Check for Updates button

2. Click the Check for updates button and allow Windows to update.

3. Once Windows is updated, update Avast.

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Option 2. Temporarily disable your Firewall

Go to Windows Defender Firewall

1. In the Taskbar search box, type Windows Defender Firewall and click the result.

Click Turn Windows Defender Firewall on or off

2. On the left side of the window, click Turn Windows Firewall on and off.

Tick Turn off Windows Defender Firewall

3. Tick Turn off Windows Defender Firewall for both public and private networks.

Tick Turn on Windows Defender Firewall

4. Allow Avast to update and turn Windows Defender Firewall back on.

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Option 3. Clean boot Windows 10

Go to System Configuration

1. Type System Configuration in the search box and click the result.

Tick Hide all Microsoft services and click Disable all

2. Select the Services tab.

3. Tick the Hide all Microsoft services checkbox and click Disable all.

Open Task Manager

4. Then, select the Startup tab, and click Open Task Manager.

Disable unneeded tasks

5. In the Startup tab, right-click each application, and click Disable.

6. Close Task Manager.

Click Apply and click OK

7. In the System Configuration window, click Apply, and then click OK.

Restart the PC for the changes to take effect

6. Restart your computer and update Avast.

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How to fix Avast failing to launch

Option 1. Repair Avast

Go to Control Panel

1. Type Control Panel in the search box and click the result.

Click Uninstall a Program

2. Click Uninstall a program.

Select Avast and click Uninstall

3. Find and right-click Avast.

4. Click Uninstall.

Click Repair

4. Select Repair.

Click Yes to authorize the repair

5. Click Yes to confirm the authorization request.

5. Wait for the repair process to complete and reboot your PC for the changes to take effect, and then update Avast.

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Option 2. Reinstall Avast

Go to Control Panel

1. Type Control Panel in the search box and click the result.

Click Uninstall a Program

2. Click Uninstall a program.

Select Avast and click Uninstall

3. Find and right-click Avast.

4. Click Uninstall.

Click Uninstall

5. Select Uninstall.

Click Yes to confirm the uninstall

6. Click Yes to confirm uninstall.

Go to Avast's website

8. Once Avast has been uninstalled, open your browser and go to https://www.avast.com/.

Click Download Free Protection

9. Click the Download Free Protection button, and wait for the installer to download.

Run Avast's installation setup

10. Run the Avast installer.

Video showing how to fix various issues with Avast

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About the author:

Tomas Meskauskas

I am passionate about computer security and technology. I have an experience of 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an editor for pcrisk.com since 2010. Follow me on Twitter to stay informed about the latest tech news or online security threats. Contact Tomas Meskauskas.

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