windows 7 - "The User Profile Service failed the logon” error. No solution working

The User Profile Service failed the logon

error is popping up each time I start my computer (on Windows 7, workgroup environment). Even Safe mode starts with Default Profile

I have tried following (through safe mode)

1. Editing registry as suggested on in Method 1


2. Tried creating a new account, through control panel or command prompt, but not working.


3. Deleted profile as suggested in the 3rd method.


4. Tried recovery options.

Ultimately, also deleted the user profile folder from C:\users, as suggested by some site. Even this didn't work.

What should I do?

Images: [c:\users while showing hidden and system files]

Edit: I tried enabling administrator account (with command prompt) and thankfully it is starting but with a lot of errors.
Still, unable to create new user with control panel.

While adding user with command prompt, user directories and registry entry are not building up.

Answer

Visit these pages, step-wise (i.e., if first don't work then try second)

1) https://support.microsoft.com/en-in/help/947215

2) https://superuser.com/a/1298468/822976

3) https://www.kapilarya.com/the-user-profile-service-failed-the-sign-in-windows-10

4) https://www.tenforums.com/general-support/67875-corrupt-ntuser-dat-file-default-folder.html (Try all solutions available here)

5) a) Try downloading Windows .iso file, newer than installed (not necessary for this step, but if it didn't work, same .iso file can be used in next step) and of same version as installed (important).

b) Mount to USB drive using Rufus (from https://rufus.akeo.ie/)

c) Boot through USB

d) Try the recovery options.

6) Use the same .iso file (from step 5) And upgrade your windows (don't select 'clean install').