Boot using a USB Windows 10 installer, open command prompt and run:
diskpart
list volume
select volume=n (where n refers to the EFI system reserved segment’s volume number that has the label “System” on there).
assign letter=S (S is the right drive alphabet which is not currently in use).
exit
bcdboot c:\Windows /s S: /f UEFI (To activate the system, change the character “c” with the character of the system partition labeled with the phrase “Boot.”).
exit
Reboot.
Boot using a USB Windows 10 installer, open command prompt and run:
Reboot.