A Guide on How to Fix Avast Virus Definitions Won’t Update

Avast Won’t Update Virus Definitions

Protecting your computer system from potential security threats is an important thing for you. Installing a powerful security software is vital. Avast is one of the popular antivirus programs in the world and it offers maximum protection against viruses, malware, and spyware.

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However, you may find Avast Virus Definition won’t update, which is annoying. The shown message is different based on how the error occurs.

The main reason that Avast Definition update failed is incompatibility issues. The Avast app you are using is not compatible with the Windows version. Besides, if you don’t install Avast correctly, for example, an update failed or was canceled during installation, Avast Definitions won’t update.

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Fixes –Avast Virus Definitions Won’t Update

Upgrade Avast to the Latest Version

One of the simplest solutions is to fix the incompatibility issues that may cause the Avast issue. So, you should check if any pending updates and install them. Besides, you should update Avast.

To update Avast, follow the guide:

Step 1: Launch Avast, go to Menu and Settings.

Step 2: Under the Update interface, click the CHECK FOR UPDATES button. After finishing the update, check if your issue is fixed.

If there is no pending update, you need to repair your Avast installation files.

Step 1: Open Control Panel in Windows (viewed by large icons) and click Programs and Features.

Step 2: Click the app and choose Change.

Step 3: In the new window, click Repair, and wait Avast makes necessary changes to the data files to repair the client software.

Reinstall Avast

If Avast can’t update Virus Definitions after trying the above method, you can reinstall Avast. This requires you to use a professional uninstaller like IObit. Or, boot your computer to Safe Mode and do the uninstallation.

Step 1: Open the Run window, type msconfig to the text box and click OK.

Step 2: Under the Boot tab, check Safe Boot and save the change.

Step 3: Restart the PC to enter Safe Mode.

Step 4: Run avastclear.exe you have downloaded on your PC to clear all the residual files.

Step 5: Boot the PC in normal mode, go to the official website to download and install the latest version of Avast. This can remove all the corrupted files to fix the “Avast won’t update Virus Definitions” error.

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Use the Built-in Troubleshooting Menu

Sometimes, the built-in troubleshooting menu in Avast is helpful if Avast Virus Definitions won’t update. Here is what you should do:

Step 1: Open Avast, go to Menu and Settings.

Step 2: Under the General window, click Troubleshooting, scroll down, and click REPAIR APP.

Step 3: Click Yes and wait until the repairing finishes.

If all of the ways cannot work, you can only contact Avast Customer Support to ask for help.

Final Words

If Avast Virus Definitions won’t update, don’t worry and this post is helpful to you. You can find some useful solutions and just have a try to easily get rid of the problem.