Update: March 31 (Major)
I find that if I key in "https://www,msn.com" first then all their news comes up https. So far doing that the problem hasn't recurred. So far, I can't get abcnews and time to come up with https, but I'll keep experimenting.
There's more. On another machine, an ASUS originally built with Windows 10 and not converted from 8.1, the MSN automatically comes up as https without having to be told do so. Are there some security problems for older machines converted to W 10 with Edge added after the fact? It looks like it.