I’m having the same issue for several days now except my popup says “Windows Web Advisor, Viruses Found” and “Zeus 2020 Trojan detected” and it wants me to click to delete them. I’ve run Avast Premium anti virus several times and rebooted to try to get rid of this popup and it is still not being removed. This is a square popup that comes in and out on the bottom right side of my screen. Hope there is a simple answer.