There is a common error that is hitting many Microsoft Windows 10 users where they cannot login to the computer with newly created account profiles. They get an error that says “The User Profile Service failed the sign-in. User profile cannot be loaded.“
This problem commonly happens because the “NTUSER.DAT” file located in the “C:\Users\Default” folder has become corrupted. To solve this issue, you will need to replace the “NTUSER.DAT” file with one from another profile to the “Default” folder.
- Login to the computer using a profile/account that works.
- Using the file explorer, navigate to “C:\Users\Default“.
- Just in case things go bad, backup the “NTUSER.DAT” file by right-clicking it and selecting “Rename“.
- Give the “NTUSER.DAT” file a name of “NTUSER.OLD“.
- Back out to the Users folder. Find a profile like “Guest” or “Public” that may not have a corrupted NTUSER.DAT file, and copy it to the “Default” folder.
- Log out of the computer and login using the account you used when the error occurred. Hopefully all works well.
Alternately, you could copy the NTUSER.DAT file from another Windows 10 computer.