This error message basically means that the affected user cannot get into their user account and, by extension, their computer, and that is most definitely a significant problem. Thankfully, there exist ways that can be used to try and fix this problem. If you want to solve this issue, the following are two of the most effective methods that can be used to do so:
Solution 1: Perform Startup Repair on your computer
Startup Repair is an ingenious little utility that can be accessed without logging into Windows and can be used to fix all kinds of problems, including Windows updates that haven’t been installed correctly or entirely or Windows updates that are simply problematic. To perform Startup Repair on your computer to try and fix this issue, you need to:
Solution 2: Boot into Safe Mode and Uninstall the update that caused the issue
Many users affected by this issue have had success with logging into their user accounts by booting their computers into Safe Mode, at which point they can uninstall the updates that caused the issue in the first place, fixing the problem altogether. To use this solution, you need to:
Solution 3: Changing LocalAccountTokenFilterPolicy Registry Key
Another workaround that worked for several users was changing the LocalAccountTokenFilterPolicy using an administrator account which wasn’t locked out of the system yet. This change to the registry can be easily done using the command prompt in an elevated command prompt.
Solution 4: Removing and Re-adding to Domain
If none of the above methods work, you can try asking your administrator or network personnel to remove you from the domain and then add you back. When you get removed from the domain, the changes get reflected in the current logging system. When you get added back, the entire process will be re-initialized and you will be able to log back in. This is only possible if you are logged in to a domain instead of just using a personal computer. Make sure to restart the computer before attempting at logging in again.
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