Yes, same pop up, daughter's lap top too but they can't even drag it aside on IPhone or XBox, like I can on the comp.
Suggest something in the WIFI?
No, it sounds like it is being pushed through from XFinity, to all the devices on your internet connection. I have Comcast/Xfinity internet service, and I’ve never seen anything like that. I think I would just keep calling them until they give you an answer. Threatening to switch providers usually will motivate them to find someone who knows how to help.