EFI Partition Creation Guide for Windows 10

EFI Partition Creation Guide for Windows 10

Boot with Windows Install Disk / Recovery Tool USB

Advanced Options -> Command Prompt:

Enter the following (hashtags are comments, not part of the command):

diskpart
list disk
select disk N # N refers to the disk which contains the deleted the EFI System partition.
list partition
select partition N # The primary partition.
shrink desired=100 # This will shrink your primary partition by 100MB, if you have at least 100MB unallocated space, ignore this step.
create partition efi size=100
assign letter=S # This temporarily assigns the partition a drive letter for reference later.
list partition
select partition N # The new partition should be selected already, but select it again to be sure.
format quick fs=fat32
list volume # Find the volume letter which belongs to the installed Windows OS
exit
bcdboot C:\windows /s S: /f ALL # C refers to the volume letter of installed Windows OS from the previous command.