I have tried all your suggestions to no avail. I was unable to boot into safe mode and recovery options didn't work either.
From the command prompt, I tried to scan the disc or use the DISM command. Neither were accepted.
By the way it lists the disc as X:\ instead of my usual C drive. When I attempted to reset completely with my recovery drive, it couldn't find the drive.
Prior to this occasion, I have had no difficulty with this machine.