In this section, we’ll discuss how to turn off avast completely for a certain period of time, or indefinitely. You can either temporarily disable Avast completely, you can whitelist those programs or applications in Avast (so they don’t get blocked), or you can turn off specific features of Avast that are causing the program/application you are trying to run to be blocked. If you need to turn off avast completely for a specific amount of time, whether to run a specific program that gets blocked by Avast, or you want to install an application and Avast is blocking the install, you have a few choices. Should You Uninstall/Disable Avast? Turn Off/Disable Avast Completely or Temporarily How to Disable Specific Features of Avastĥ. How to Whitelist Blocked Programs in Avastģ.