Computer won't boot up - stuck in Automatic Repair loop

[pwitt]

My Pavilion 24 All-in-one is stuck in Automatic Repair blue screen.  I've tried to reboot, done a hard resent, run diagnostics (everything came back fine).  When I'm in Automatic Repair, I go to Advanced Options, then to Troubleshoot.  I can't do a Command Prompt, Uninstall Updates, or System Restore because it keeps telling me that I have to be logged in as an Administrator, and that there no administrator accounts on the computer.   I have not added any hardware, done any updates that I know of recently.  Any suggestions at all?  

[Grzwacz]

Hi,

Never had this happen to me.

First run HP Diagnostics. Start the PC. Tap "ESC". Select "F2". Run system and then all component tests.

I would then go here (Link) if diagnostics pass.  A failed diagnostic test means you have to replace specific hardware.

Create W10 installation media on a different PC.

Do a clean install using the installation media. But you will lose data unless you have data backups. This means you should connect the storage device containing data to a different PC to recover data before you do a clean W10 installation.

Regards