Dell desktop stuck in looping dots after Windows 10 update

Hi,

I have a Dell Optiplex 765 that is stuck in the looping dots of death after a Windows 10 update that occurred in the last few days.  The first time that it occurred, I let the loops run for multiple hours.

I've tried hard restarts (power off), and that does not address the problem.

I've tried starting in Safe Mode, but apparently that is no longer an option on Windows 10.  

Any suggestions for help are greatly appreciated.

Thanks!