Managing personal Outlook.com account settings, security, and privacy
I appreciate all the comments/responses.
In response to Hornblower409's comment that it's my browser, I did state early on that it made no differene whiat browser I was using or if I was in private mode.
In response to thesimslover298-36's comment and as Hornblower409 noted above, it's a dup; however, I did already try making some change (and reverting it later) but it made no difference.
However, the pop-up's have stopped happening consistently and now happens most of the time, instead of all the time. Mabye it will eventually go away, as Javier Luna noted above.