This also might be a case of a corrupted account. Can you still login to your other Windows accounts than your usual one?
Just in case you didn't know (it might be useful if you have to reset Windows 10 to its initial settings), it's a recommended practice since the days of Windows 95 to have at least to admin accounts. One for normal use, and one spare in case the normal one is corrupted. Then you can still login and get everything working again.