How to fix "preparing automatic repair"?

Please list Dell model number and version of windows. Example: Dell Inspiron 3543, windows 10

How to find the product model of your Dell computer | Dell US

In meantime, the computer is still able to boot into windows ?

Do you remember if there was a windows or Dell update before 'Preparing Automatic Repair ' message appear?

You ran Dell Diagnostic tool to check Hard drive and Hardware within the computer ? 

Dell Diagnostic Tools to Diagnose and Fix Hardware Problems on Your Dell PC, Tablet or Servers | Dell US