Hang on I think that was a different method that basically locked Explorer from deleting something that was set to try combat this.
Your method should be ok, I will try it now.
I've been having that problem with the last few insider builds, it's been driving me nuts.Having nvidia gamma setting problem with latest fall update, it applies it then takes it off! arghhhhhh.
Tried a clean install, still same.
I've been running with the regedit fix for two days now and my thumbnails haven't reset in that time, so it seems to have worked
Assume one is your old account from years ago AFAIK Hotmail Accounts became MS Accounts.
remember Hotmail was only your E-Mail back then, now the accounts are tied to Widows and Office and your subscriptions to likes of OneDrive etc.
I would think there is a way to mange these old accounts if you visit MS site and log in.
My account is old so I log in though https://account.live.com/ which then redirects me to https://account.microsoft.com/
Additional calendars should be in the side bar...
https://outlook.live.com/owa/?path=/calendar/view/Month
Well now I'm confused. At first I thought you were talking about windows 10 mail app which should just mirror whatever you see on the outlook.com/calendar web e no other calendars in there. Just android that is showing all these different calendars. interface. Now you're talking about android. Are you sure that doesn't display google account calendars too?