If you already know this, then you don't need to read on.
problem was @ not working
and the solution that I found using a combination of Google and trial and error was
use these three keys simultaneously:
ctrl, alt and the key that has @
(which key that is differs I have discovered depending on which country you are in).
Doing this re-activated alt gr which is they key I have always used in conjunction with the key that has " 2 @ on my computer,
Apparently some of Microsoft's updates de-activate the alt gr key!
Typical Microsoft and so useful (NOT).
Hope others find this helpful when trying in vain to access their e-mail accounts.
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