How to sign in to your Microsoft account

[News]

Use your Microsoft account to sign in to Microsoft services like Windows, Office 365, OneDrive, Skype, Outlook, and Xbox Live.

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[Peterr]

I have read about sign in but still have a question. When I try facial recognition or hello it says it cannot find my camera but the camera works with all else.
I have a pin but it seems not to apply to MS. I use it for all else fine. I can sign in as I always do with an admin account which I realize is not as good as a local for privacy but it won't work either. How can I get an alternate sign in without losing my admin act or losing my pin which may be a google pin. Whenever it asks for a pin and I inset mine it works except for this alternate sign in.
I am not on a high level s you can tell.
This is alltaking place on the calendar reminder on my MS account. The calendar is part of my email editor 'Windows Mail'.