windows 10 - Boot error loop -> /rebuildbcd error and cant set active volume

Background

After my sister's three months of vacation with no internet access, she got home and there were many updates for Windows 10 and Norton installed.
After reboot Windows didn't start. Instead "the boot configuration data is missing some required information" showed up.
I got a photo of it, but can't read the error code. It's something like 0x0000? The file is BCD though.

To solve this, her dude added her SSD disk in his own computer and according to them some sort of repair process finished successfully.

Then he put her SSD back in her laptop, after Windows automatic repair process it got stuck and Windows complains about RecEnv.exe "memory could not be read" (RecEnv.exe is Windows recovery environment).

Here is my diskpart list

Things I've done

• I have created a Windows 10 32/64bits UEFI GPT formatted bootable USB so I can get to the command prompt




• Memory tests through HPs utility have passed



• CHKDSK /R passed; no bad sectors on all discs.


• Sfc /scannow reaches verification 100% complete, but error:

Windows resource protection could not perform the requested operation

• bootrec /fixmbr ok


• bootrec /fixboot ok


• bootrec /rebuildbcd error:

The requested system device cannot be found

• After this I tried to assign volume 4 the FAT32 disc letter N:


• bcdboot bcdboot c:\windows /l sv-se /s N: error:

cannot copy boot files

UPDATE

• bcdboot bcdboot c:\windows /l sv-se /s N: /F ALL BFSVC Error:

Failed to validate boot manager checksum
(C:Windows\boot\EFI\bootmgfw.efi)!
Error code = 0xc1 Failure when attempting to copy boot files

So something is wrong with bootmgfw.efi. How do I solve that?

I copied the bootmgfw.efi from X:\windows\boot\efi to the same folder on the C: partition and VOILA! then I was able to bcdboot bcdboot c:\windows /l sv-se /s N: /F ALL

Next problem Windows can't start because of ntosext.sys error code 0x000007b. Seems like the whole Windows has been messed up somehow.