I have a membership to Yoga International. Haven't been able (recently, since upgrading to Big Sur mac) to log into Yoga International until I shut down Core and Web shields. This sort of defeats the purpose of Avast. So it's a workaround, but a clumsy, time consuming work-around, not a real solution. Can anyone help? PS, there's no way these "letters" to veryify can be read! Aurgh! :-(