It says I can’t access Yahoo mail because it uses “HSTS.”
I never heard of that one. I did find this out on the Web.
“I just used my account successfully. Try deleting your browsing data, three dots upper right, setting, clear browsing data. Restart Edge. Test”
HSTS is that new thing where sites don’t connect as “http:” anymore, but use the secure HTTP prefix “https:” instead.
Attempting to connect to a site using an old “http:” bookmark should trigger any modern browser to automatically upconvert to “https:” but using older software and hardware I’ve found it’s not a bulletproof proposition.
If you try to visit a site and get that HSTS thing, take a look at the web address and make sure your browser isn’t trying to hit “http:...” If so, you might try manually inserting the “s” to make it “https:...” and see if that tweak enables you to get where you were trying to go.
If so, update the relevant Bookmark.
Just for grins I fired up and old XP laptop I have and tried to browse the web using good old IE4 — it’s practically incapable of doing anything useful on today’s internet.
I have a VISTA machine that runs Firefox — the browser cannot be updated any further so Mozilla created a maxxed out version of Firefox that’s as capable as can be under VISTA. It MOSTLY does fine, but still there are sites it can’t understand.