It should be ONO6B202015
Since it is working now I don't think it will help to login from Internet Explorer. I tend to use Chrome only as Internet Explorer gave me a lot of trouble.
Google Chrome has an option that will reset itself to its default settings. To find this option, open Chrome’s menu and select Settings. Perform a search for “reset browser” and you’ll see the Reset browser settings button.
You could also just plug chrome://settings/resetProfileSettings into Chrome’s address bar to pull up this page.
Use this option and Google Chrome will erase almost everything — your extensions, settings, cookies, history, home page, default search engine, and more. Chrome won’t delete your bookmarks or passwords, so your important personal data will be kept.
If Hotmail came back on its own without resetting Chrome (and has always done so before - eventually ) does it need to be reset? I thought it must be a problem with Hotmail/Outlook itself, since nothing has been done at my end to restore it. Just wondering.
I will keep your reply to try your recommendation next time it happens. In all the years I've had Hotmail, I've never had any problem! Maybe I've been lucky! Although the problem resolved itself (as it always does sooner or later) thanks for your info.