Windows 10 stuck in a loop
Best way I can describe it.
Windows 10 home fully updated and a fresh install on a new computer so not an upgrade from a previous version. It's been running well for about a year.
It is set up for two users.
Last Friday it crashed all on it's own while nobody was using it. I think it was on the BBC News home page (Firefox) and monitoring e-mail (thunderbird).
It was showing the standard windows wallpaper and a handful of shortcuts.
It said that an app had caused a browser crash and it was unable to sign on to Microsoft and it had reset to a local log in and edge.
Nothing is missing and I can reset everything back to how I have it and all works perfectly.
When I shut down however all is lost and I revert to the standard wallpaper etc.
How can I break out of this, reset my profile so that after spending a considerable time rebuilding I don't loose all.
My wife's log in works normally throughout.
I hope I am clear.