Sounds like the latest update had issues and it had to revert.
[Satire] Welcome to Win10 Hell, you've been fully baptized by our Microsoft overlords. There was a reason Bill's last name was GATES ya know. LoL
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You can schedule whnen win10 will restart to install updates in Update & Security> Windows Update. It may help you in the future. I also perform a backup once I determine the update is stable. Its faster for me to restore the backup then for windows to recover from the failed update.