At this point, I believe that the issue is with Windows Mail (not Windows 10, itself). I have seen (in another site) a reference to it being a"feature". Some feature! It is a complete annoyance to...

I did as suggested, and I did remember to reboot the laptop, but it didn't affect the e-mails in any way. Not only did it not eliminate the pop-ups, but it didn't make them smaller, either.

Is...