Critical Error on Startup

Critical Error (message)
Start menu and Cortana aren't working. We'll try to fix it the next time you sign in.
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(Tried but it returns each time)

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Reply to: Critical Error on Startup
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Re: critical error
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In case anyone else reads this thread, this was an free upgrade from Win7 by Microsoft that I accepted. I was obliged to provide a Password. My PC is part of a home network of 3 PCs. Because all stored network files were in the Win10 control, when I got the Critical Error, all PCs were denied access to the files. I shut down, restarted and pressed F8 then Esc. It gave me sufficient access to Change Password that I removed it. Then when I restarted the PC, it was OK. Scary though! It's been fine since.
Thanks, Mr. Kees.

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