HELP>>>>>>>>>>>>Win 10 Pro: Phase 1 Initialization Failed SOLVED but curious?

sfc /scannow trying it in safe mode now. repair just does not work so far
 
couldn't get sfc pAST 37% BEFORE. IN SAFE MODE IT IS UP TO 80% ALREADY-SORRY ABOUT CAPS, NOT USED TO MY LAPTOP

I must have just missed it be cause that has to be what happened. I tried sfc  first, stuck art 37% 2X.
But I did not have the W10 pro dvd loaded. 
Then in Safe mode, using sfc in admin prompt with the win 10 dvd in it went to 100% and all was well.
 
I know I shouldn't care why. but I kind of like to know if it was something I did. I guess I will never know.
when I first got the dreaded message and went into the continuous reboot loop I tried the Gpart usb drive I made. 
It is an amazing tool. When I looked at the physical drives they checked out as fine. That immediately gave me hope.
Because I had thought that the new (well new to me) Samsung Evo 850  ssd OS drive had died.
Also did a virus scan with Gpart ...just a great tool.....
 
Oh well, So I will never know......................I have backups, images, etc, in multitude but couldn't be sure what it was. 

I take full scheduled images every day and every week, retaining 2 copies of each.  I take the daily and weekly images on different external drives in case of physical loss or failure.  The weeklies are physically locked up separate from the computer.
 
If I needed to restore my system, and my most recent image is corrupted, hopefully I will only need to go back to two days prior to recover my computer.  If that file is also no good, and I have to use the other backup drive, I might lose up to a week.
 
My primary backup software is Macrium Reflect, but about once a month I also make a full image with the native Windows image tool. 
 
The Windows image file can always be restored by booting with the Windows system repair thumb drive.  That is a contingency plan just in case Macrium ever developed a corruption issue and all my Macrium backups were bad, or for some reason the Macrium recovery environment was unbootable.  That hasn't happened to me yet, but got that base covered too! 

I trust SFC. That is good insurance against a corrupted system file. 
 
But I have never really trusted the Windows restore points.  To me that may be one way to get your system booting again, but can potentially leave loose ends and some applications out of sync timeline wise. The restore points can restore your registry and system files back to an earlier time, but application files are not touched.  So after you roll back, you need to figure out what needs to re-installed that you may have updated since the restore point snapshot was taken.  Those registry entries would now be erased.  In this scenario, I much prefer a full image restore, no loose ends...