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Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
Inside the advanced options, troubleshooter.
Did you try the system restore option, and did you try a system restore date before the problem started?
Ok.. Do you have another computer, windows 7 ,8 or 10?
Ok.. Have you tried a refresh ( not a reset )
A refresh will remove your programs and updates, but will keep your files safe in a windows.old folder.. So you wont lose any pictures, documents, etc..
You can access the reset or refresh from the advanced menus..
If you do go with a full reset, make sure you choose to Keep files~
Ok, did you try both refresh and reset?
How about this.. if you go to the troubleshooting, advanced page.. And then click show more options./
Then go into startup settings.
When the computer restarts and shows the new menu.. Can you start in safe mode or safe mode with networking?
I'll be here..
And if it gets stuck on a white line of code.. ( after you press the number or select safe mode)
let me know the line of code it gets stuck on.
When did it say you ran into a problem, after you chose startup settings?
Ok.. the black screen that says you have a problem and the computer will restart.
At that black error screen, try this
Now, if you can get the command prompt to come up that way, let me know..
Otherwise, we can try to access the command prompt through the advanced setting instead.. At which point I will relay some commands to run inside the command prompt.
Ok, run this command first
Sfc /scannow And hit enter.
When it completes, run this command next
Dism /Online /Cleanup-Image /RestoreHealth
The spacing has to be precise....
net user test <password> /addnet localgroup Administrators test /add
If that works correctly, when you restart you will see a new user, and the password ***** be password.. Try that and lets see what h appens.
how about this cd c:/
Hit enter.. does it change it from an X prompt, to a c:/ prompt?
It seems your windows install is beyond the means to easily recover it.
Before we discuss options, do you h ave critical data, pictures, documents, on that hard drive you need to save?
Or, is the main concern getting windows up and running again whether or not you lose files?
Lets try sfc /scannow again
if it errors, type chkdsk /f
let me know the results of each
lets go with yes.. force it to dismount.. Then, it should start check dsk or ask you to restart the computer.
People have such a delightful time with Windows 10. Now you know why an expert like me uses Windows 7, having only recently been dragged--kicking and screaming--from Windows XP. "If it ain't broke, don't fix it."
All the diagnostic says is, "A critical process has died?" That's rather hard to believe.
So, if it died, reboot, and it should be restarted--unless the executable file or allied components have become corrupted for some reason. ("Some reason"? It's Microsoft!)
Have you tried rebooting off a pristine installation kit--or from a bootable backup device that you were SURELY STRONGLY ADVISED TO CREATE the moment you first powered up?
BTW, when in doubt, don't waste time trying to kill processes/applications/programs/threads with Task Manager. There are more bugs in that utility than you can shake a stick at. ALWAYS WORKS: (sorry for the brutality) PULL OUT THE PLUG, then replug and power up.
Sorry. I had connectivity issues late yesterday.
If a cold boot results in the same situation, your installation is corrupted. How it got that way is anyone's guess.
The safest action is to reinstall Windows 10 from scratch.
A safer action is to use Windows 7.
A yet safer action is to use Windows XP.