I get this problem
but ONLY when I go to yahoo . It's always a big red page warning me I may be infected, etc. and wanting me to call such and such number.
I know it's b.s. and never call the number.
I don't look at the page very long and just close it out ( sometimes have trouble closing it out though ) so can't give you more specific details .
I have and run Malwarebytes...not finding any issues. I also run superantispyware frequently and find very few, if any, issues when I run it.
Windows 10 here, using google chrome with Avast anti virus.
Thanks if anyone can tell me how to stop this annoying ad !