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Win 10 does not boot anymore - error 0xc0000001

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#16
FreeBooter

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I learn something new today that is EFI system partition (ESP) cannot be set active.
I don't know why Bcdboot and Bootrec commands does not work if you want you can replace registry hives and see this will resolve the error message.


Windows Vista/ 7/8/8.1/10 keep a regular backup of the registry handy in case you need to overwrite a corrupted registry. By default, the RegIdleBackup task runs every 10 days, so that’s as far back as you would lose if you replaced the current registry with the automatically backed-up files. You can find the backed-up registry files in \Windows\System32\config\RegBack folder.


Please boot your computer with Windows Setup Media and from Windows Recovery Environment start the Command Prompt.


Please type below commands into Command Prompt and for each command you have typed press Enter key.


 

Ren  C:\windows\system32\config\SAM         SAM.BAK

Ren  C:\windows\system32\config\SYSTEM      SYSTEM.BAK

Ren  C:\windows\system32\config\SECURITY    SECURITY.BAK

Ren  C:\windows\system32\config\DEFAULT     DEFAULT.BAK

Ren  C:\windows\system32\config\SOFTWARE    SOFTWARE.BAK

 

Copy  C:\Windows\System32\config\RegBack\SAM         C:\windows\system32\config

Copy  C:\Windows\System32\config\RegBack\SYSTEM      C:\windows\system32\config

Copy  C:\Windows\System32\config\RegBack\SECURITY    C:\windows\system32\config

Copy  C:\Windows\System32\config\RegBack\DEFAULT     C:\windows\system32\config

Copy  C:\Windows\System32\config\RegBack\SOFTWARE    C:\windows\system32\config

This procedure assumes that Windows Vista/7/8/8.1/10 is installed to the C:\ partition. Make sure to replace C:\ drive letter to the appropriate Windows OS installed partition drive letter if it is a different location.


Above commands renames the registry files at their existing location, and then copies the registry files from the RegBack folder to the C:\Windows\System32\Config folder.


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#17
Paul432220

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Hi Freebooter,

 

Excellent news, after having executed the above commands, i restarted my PC, i got some intermediate messages from the PC saying he was correcting something

on the drive and then W10 started up like before. All my apps are there and at first sight, everything seems exactly as before.

Not clear to me why i saw these "correcting drive" messages as i ran a full Lenovo diag without any issues coming up.

 

Anyway i'm again up and running with this PC !

Thanks a lot for your support, appreciate it!

Cheers, Paul.


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#18
FreeBooter

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You are very welcome! :thumbsup:


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