You don't need to mess around with Edit Boot Options menu you can boot into Safe Mode from Windows Recovery Environment.
You’ll see a version of the familiar Advanced Boot Options menu. Press the number corresponding to the startup option you want to use (i.e., press the 4 key for regular Safe Mode).
Have you restored registry files from backup?
Since the BCD store exists and lists a Windows installation, you'll first have to "remove" it manually and then try to rebuild it again. At the prompt, execute the bcdedit command as shown and then press Enter
:bcdedit /export c:\bcdbackup
The bcdedit command is used here to export the BCD store as a file: bcdbackup
. There's no need to specify a file extension.
The command should return the following on screen:The operation completed successfully.
Meaning the BCD export worked as expected.
At this point, you need to adjust several file attributes for the BCD store so you can manipulate it. At the prompt, execute the attrib command exactly like this:attrib c:\boot\bcd -h -r -s
What you just did with the attrib command was remove the hidden, read-only, and system attributes from the file bcd
. Those attributes restricted the actions you could take on the file. Now that they're gone, you can manipulate the file more freely - specifically, rename it.
To rename the BCD store, execute the ren command as shown: ren c:\boot\bcd bcd.old
Now that the BCD store is renamed, you should now be able to successfully rebuild it.
Try rebuilding the BCD again by executing the following, followed by Enter
: bootrec /rebuildbcd
Restart your computer after rebuilding the BCD store.
If above command does not work please execute below command and reboot your computer to see issue resolves.
DISM /Image:C:\ /Cleanup-Image /RevertPendingActions
Replace C:\ drive letter with Windows 10 installed partition drive letter.