This story shows it makes sense to postpone automatic backups and run them manually immediately after making an image backup, so you can go back easily if you need. I don't do it for the monthly backup, but I do for the upgrade each 6 months.
Anyway, use Microsofts Media Creation Tool to make an install disc or stick of the latest version and use that to reinstall Windows over this corrupted installation. There's a very good chance it works.
I was 'AFK' for about half an hour and when I came back I discovered my PC updating witg 20% progress before then experience a power cut/outage. After regaining power I switched my PC back on and discovered it is now stucm in a Loop: It says 'Zoostorm' with a loading circle underneatg it (what normally displays when starting up my PC) for around 20 seconds, the screen goes black, new display and at the bottom of this black screen it says 'Attempting to recover installation' with a loading circle above for around 1-2 seconds, new display at the bottom of this black screen is says 'Restoring your previous version of Windows...' for around 1-2seconds, then another black screen comes out for around 1-2 seconds, finally it cuts out and my monitor displays 'No Signal Detected!' (What normally happens when my PC is turned off). I had my PC turned off and all the wires disconnected overnight (for 14hours total) and it has now been in this loop for an hour so I know for sure there is no progress that will take place. No F2, F8, F12 or Ctrl + Shift + Esc is working, I've looked through forums and can't find any solution for my problem. Please can someone help, even if it means losing all of my data.


Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic