Avast Mobile Virus Definitions Update Failed [Solved]

Avast mobile virus definitions update failed error is one of the most frequently encountered errors. Most of the time, this problem arises due to compatibility issues. If the Avast antivirus is not compatible with the Windows version you are using, then this issue might pop up. 

If the Avast antivirus is installed incorrectly, then also the error might trigger up. You also can face this issue if the update failed or if you canceled the updating process during the installation. 

In case you are stuck with the same problem, then you need to solve this immediately so that Avast can provide maximum protection against spyware, malware, and viruses. 

Easy Hacks to Fix ‘Avast Mobile Virus Definitions Update Failed’ Issue:

There are a few ways to resolve this issue. You can also perform the methods described below: 

Fix 1: Repair and Update

It is one of the easiest ways to solve the incompatibility issues. Check if any Windows update is pending. An outdated Avast antivirus program can help to increase the CPU load and trigger the ‘Avast android virus definition update failed’ error message to appear on the screen. You can even solve this by updating the Avast antivirus program. 

How to Update the Avast Antivirus Program? 

  1. First, navigate to the notification tray and open the Avast GUI. 
  2. Navigate to the Update tab and you will find the current versions of the antivirus program. Here, you will also get the latest virus definitions. 
  3. Now, you can check if there are any pending updates. Then, tap on the Update button. 

If you see there are no updates available, then you can repair the Avast installation files. To repair the Avast installation files, you can have a look at the steps mentioned below: 

  • In the beginning, open the Control Panel by going to the Start menu. 
  • Afterward, navigate to the ‘Programs and Features’ category. 
  • It will then open the list of programs that are installed on your computer. Search for the Avast antivirus program installed on the system. 
  • Once you get that, right-click on it and choose the ‘Uninstallation’ option from the list. 
  • Afterward, tap on the Change button to continue. 
  • Next, click on the Repair button from the next page and wait for a few seconds until Avast repairs the program by making the necessary changes in its data files. 
  • Lastly, restart the computer and check if the problem is resolved. 

In case you see that you are still not able to update virus definition, then you can move on to the solutions stated below. 

Fix 2: Reinstall Avast Antivirus

If repairing and updating does not help you to fix this problem, then you can try to reinstall this program to get rid of this issue. To reinstall the Avast antivirus, first, uninstall the antivirus program and then reinstall it again. 

How to Uninstall Avast Antivirus Program? 

  1. First of all, visit the official website of Avast and download the uninstaller program ‘aswclear.exe.’
  2. Afterward, restart the system by holding the F8 key from the keyboard to start the system in Safe Mode. 
  3. Next, go to the location where you have saved the ‘answclear.exe’ program and click twice on it. 
  4. Then, go to the location where the Avast antivirus program is saved. Right-click on it and choose the ‘Remove’ option from the list. 

After uninstalling Avast antivirus, restart the computer. Then, reinstall the program to get rid of this issue.

How to Reinstall Avast Antivirus Program? 

  • In the beginning, go to the official website of Avast once again and search for the Avast installer by using the OS that you are using. Once you get that, download the installer. 
  • Afterward, go to the location where you have saved the Avast installer. Click twice on that and check the box to accept the terms and conditions of the license agreement. 
  • Now, check the boxes for features like Google Chrome Web browser, Google Toolbar, etc whichever you want to download with Avast antivirus. 
  • Now, tap in the Next button to start the installation process. 
  • Once the installation process is completed, you can restart the computer to apply the changes. 

Now, you can check if you can update the Avast virus definition.