David, thanks for your knowledgeable suggestion. Thanks for the info on Malwarebytes. Yes, I do run it. Latest scan said Objects infected: 0.
Sorry about all the disorder. Avast was updated at least 1 time between the sequestering of the files yesterday PM and the all clear today AM. This still does not explain the virus total results, nor the flagging right after new reload of Win with the same version of Avast that did not see it before reload. I reloaded Avast from a thumbdrive.
I tried your fix of checking ‘Scan traffic from well-known browser processes only,’, unfortunately, something else must still be blocking all the cameras.
Yes, being without much knowledge, paranoia abounds and malware does come to mind when I see all firewalls turned off at will. Thanks for all your help.