The antivirus browser addons are noted at http://www.howtogeek.com/239950/dont-use-your-antivirus-browser-extensions-they-can-actually-make-you-less-safe/
So there it is, uninstall the entire AV Suite and go back to Defender. Here I bolster my security with Web Of Trust, Ublock Origin and common sense ideas like not installed cracked software, going to bad sites and opening email attachments.
I recently removed the free Avira antivirus to go to Windows Defender. In doing so, what remained in my system was Avira Browser Safety, which is listed as an extension. I cannot remove it and while it remains on my system, I cannot load Windows Defender. One helpful hint says to start up in "Safe Mode" which I cannot seem to make happen. Any constructive suggestions would be greatly appreciated.would