The solutiion of pressing the Power Button on & off until "Automatic Repair" was very promising. I tried it including the Advanced Option of Reseting the laptop but keeping data files. I was then told that Windows will be reinstalled without affecting others. But during the Installation, it stopped after 6% and then showed the remark, "There was a problem resetting your PC. No changes were made."
So instead, I tried Start Up Repair option. But it also didn't work. It said, "Start Up Repair couldn't fix your PC. Log C:Windows/System32/Logfiles/Srt/SrtTrails.txt.
So again I tried another option which is System Restore. Unfortunately, it said, "Could not find offline boot volume".
I really thought one of these things would work when "Automatic Repair" menu appeared for the first time after pressing the Power Button On & Off as instructed. But alas, I was just prompted with an option to either go back to Advanced Options or simply Power Down the laptop. I chose the latter.
THANKS for the initial solution that I really believed was going to resolve it. Any other additional advise on solutions to my laptop's problem?