This afternoon when I started my Windows 10 PC, it instantly raised my blood pressure to the harmful levels because it logged into a temporary account instead of my usual user account. Then a message appeared on the screen – “You’ve been signed in with a temporary account”. Apparently, there was a power failure in the office building earlier and all the computer were powered off and I suspected that the power failure had something to do with it. The power failures or hard disk problems could cause the user profile to become corrupted and there is only so much you can do.
You can try two methods to fix this problem in Windows 10:
Fixing using ReProfiler:
ReProfiler is a third party, open-source application that can assign a user account in Windows to a user profile folder and make the necessary changes in the Windows registry. The same steps can also be performed manually, but ReProfiler makes everything easier.
You have to launch ReProfiler using an elevated account. A list of all the user accounts is shown on the top and the user profile folders are listed in the second list. Select your user profile from the list, select a user profile folder and then click on the Assign button. If you are using a password to protect your user account, then you can click on the Test button to check if everything went as it should. Now reboot your PC and everything should work fine.
If ReProfiler Does not Work:
If the above method does not work, then clearly the user profile folder and perhaps other files were corrupted during a power failure or hard disk failure or due to some other reason. Now what you can do is fix the system files and create a new account and use this new account from now on.
To fix the system files, start an elevated command prompt [press Win+X and select Command Prompt (Admin) from the menu]. In the command prompt, type sfc /scannow and press Enter. This will scan your system files for corruption and fix them if needed.
Next you will have to create a new user account, for this again open an elevated command prompt and type in control userpasswords2 and press Enter. In the window that opens, you can add a new user account. You can even make this new user account as the default sign-in user account.
Conclusion: Windows 10 might not load your user profile because of corrupted files or corrupt registry entries. If registry entries have become corrupt, then you can use ReProfiler to fix it. If files have become corrupt, then you have no choice but to create a new user account.