Yes, AOS is listed. I got the Avast icon to come up @ top right of screen @ address bar. WHAT I DID was to go to programs and features> Avast> right click the program> change> repair. I let it run (finished successfully), and tried my IE 11. Voila, the Avast Icon comes up every time. I suppose it is alright now, but still DON'T KNOW if Internet Explorer 11 is supported by Avast Free Antivirus.
Thanks to all for your help.