


This ended up forcing the virus signature updating function to display an error, even though the update was properly installed and the virus protection signature was up to date but it is still better to update the software so that Avast virus definitions download has failed issue can be rectified:

This specific problem occurred due to a bad date that was being pushed along with the update. Numerous users reports stated that this error was caused by an Avast bug that was resolved since version “6.16”. Workaround: Method 1: Update Avast Software Now that you have been made familiar with most of the reasons due to which this error occurs, we can finally move on towards implementing fixes to eradicate the Virus Definitions download has failed on the Avast Antivirus issue.

Below, we have compiled the reasons due to which you might be getting this error. This Avast Virus Definitions download has failed error occurs on Android, Mac, and mostly on PC. What Causes the Avast Virus Definitions Download has Failed Error? Make sure to follow this guide carefully and read through all the solutions in order to ensure complete eradication of this issue. In this article, we have set out to fix this issue by applying various solutions, fixes, and workarounds. However, some users have been getting the Avast Virus Definitions Download has Failed error while trying to update the Antivirus Definitions. Avast is one of the most popular third-party antiviruses out there and it provides excellent protection against threats to your computer.
