This is on my parents' computer, which they have a bad habit of not turning off once they're done using it. My father has started to do some electrical work on the outlets in the same room and cut the power while the computer was still running. When I booted it up the next time, it gave me the error in the title and everything was set to its defaults. I have tried the tried and true method of turning it off and turning it back on again to no avail. Going into the file system, "This PC>Local Disk>Users" I can see the new user named TEMP was created when I first tried turning the computer on after the unexpected shutdown, as well as the main account I need to log into. Going into the main account folder, I can see all my parents' files are still there.
When logging in it gives me the main account name as well as the same password to login, and once logged in, going into the start menu, it shows the name of the main account, but none of the customization of the account is there.
I'm assuming that Windows is still logging me into the temp account, or Windows is confusing the temp account with the main account somehow.
I am afraid to mess with it anymore, and would appreciate any feedback before I continue.