Windows 10. The MS PIN is no longer recognized and does not show the admin account. How to recover the account and data?

[Microsoft Windows]

Windows 10. The MS PIN is no longer recognized and does not show the admin account. How to recover the account and data?The only account available is the GUEST, in which all of the data is available. MS tends to forgot the pin or does not recognize. Generally if i reboot, it's somehow re-recognized and OK. The simple reboot does not work. How to prevent this in the future, or is there a better solution? eliminate the pin/pw for the admin account? (Since guest account seems unaffected by this issue)

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