Windows 8/10 fails to boot, Bootrec not working

Last Updated: 4/20/18

I had two drives. I moved one to my new computer, because I thought it was just a data drive. The drive I removed had my BCD EFI boot partition. So now the older PC was unable to boot.

I booted to a Windows 8.1 installation DVD and entered the command prompt.

First I tried this, but the bootrec was not enough. it said boot store not found or missing.
https://www.easeus.com/partition-manager-software/fix-uefi-boot-in-windows-10-8-7.html

Then I found method two here, but I had no unallocated space on my desk:
https://www.easeus.com/partition-master/restore-repair-deleted-efi-boot-partition-in-windows-10-8-7.html

Solution:

Use the restore EFI partition instructions from the second link above, but first use the "shrink" command of diskpart to free up 300 MB of space. It worked like a charm.

sample commands:

list volume
select volume 1
shrink desired=300

list disk
select disk 1
create partition efi size=290
format quick fs=fat32
exit

bcdboot c:\windows

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