UEFI boot

Convert Windows 10 installation to boot from UEFI partition.

• Run Windows and start command prompt

OR

• Boot from Windows 10 ISO
• Select Repair PC
• Select Command Prompt or press SHIFT+F10 to spawn command prompt.

With command prompt:

diskpart
list disk
select disk # Note: Select the disk where you want to add the EFI System partition.
list partition
select partition # Note: Select the Windows OS partition (# number) or your data partition.
shrink desired=100
create partition efi size=100
format quick fs=fat32
assign letter=s
list partition
list volume Note: Note the volume letter where the Windows OS is installed.
exit
 
bcdboot X:\windows /s S: