Several months ago I naively let Froover onto my computer. Now whenever I go to a new web site I get an annoying pop-up promising fantastic rewards in the name of that website. I delete the page before it finishes loading, but the offers keep coming back. How can I remove this annoying program? I have Windows 10, Froover doesn't appear on the app list. (Please explain gently--I really am a newbie.) TIA