Clearly it isnt. This is a well established forum .
Imho I use AVG on android and pc .
In my work with IT systems I have seen Avg find and remove a fair few Viruses on systems with products similar to that which you mention.
I would remove it, Try an Avg scan and perhaps check your security settings.
But Having used this forum through Pc and Android and Apple ios. And the three main Browsers ( Firefox being the better of them) , I have never encounterd that either.
Hope this post is of some help.