I had a very annoying pop-up today and this website did the trick: https://www.fixyourbrowser.com/remo...-fast-push-com/#Remove_Fast-pushcom_from_Edge
Mike run a proper anti virus program and do a full scan of your computer, I wouldn't trust any site with a name like fixyourbrowser, there is a good chance that you now have one or more programs installed that have hijacked your computer. Even if you already have anti virus software installed it would be worth installing the free version of Malwarebytes as well and running a full scan as a secondary confirmation.
In my experience Norton is too intrusive and doesn't actually stop stuff from entering on your system, but tells you it is there.. A bit late... McAfee just as bad, and it is very difficult to get them off to install something better