Thanks for your assistance bob3160, very much appreciated 
It worked, but surely Avast could come up with a easier way.
I uninstalled using uninstall in Win 10. Rebooted
Used avast clear in safe mode. Rebooted.
AVAST Antivirus Clear Uninstall was now an option in Boot menu, when booting up.
Removed using msconfig. Rebooted
Have rebooted 4 Times after reinstall and have been getting Firewall Turned off and settings on Public not private. Last boot did not appear, keep fingers crossed.
I have been using Avast now for 11 years, if I didn’t have nearly 2 years left on my 3 computers License, I would be uninstalling it for good.
Disgruntled user >:( >:(