Question Author
Thanks again Buenchico, I've downloaded and run Malwarebytes and quarantined all the things that were found, but sadly I still have the issue. By right clicking the banner I can "copy link" this gives me windows-feedback:///?contextid=509 It is a nuisance because on Microsoft pages a new message keeps coming up "What do you want to do with get-user-id? From: ads.yahoo.com" with options to open, save or cancel. I've tried all sorts of response, been asked to log in to my Microsoft account, which I did but not from the link. Clicking "cancel" removes everything but after less than a minute the message re-appears. Not a dramatic problem for me, just a blasted nuisance.