This article explains how to remove Avast Antivirus from your computer. It has a special Self-Defense Mode that prevents malicious software from removing it. You need to disable this mode before you can remove the program.

To disable Self-Defense Mode in Avast, you need to go to a 'hidden' section of the settings.

Open the Avast user interface and click Menu at the top of the user interface.

Select Settings from the drop-down menu that appears.