HyperV; Copying or Moving a Virtual Machine
Ingredients of this Issue
Hyper-V on Windows Server 2012 or 2016 Host
CentOS 7 (should work with other versions), Generation 2 Virtual MachineT
The Virtual Machine will not boot.
The Error Message
Failed to open \EFI\... Not Found
Failed to load image \EFI\Boot... Not Found
Boot from a DVD, preferably a recent one. Follow the prompts of the boot DVD, have it find the OS, mount the found OS as the root file system (the boot DVD will prompt you for these items)
mv /boot/efi/EFI/BOOT /boot/efi/EFI/BOOT.old
cp -R /boot/efi/EFI/centos /boot/efi/EFI/BOOT
cp /boot/efi/EFI/BOOT/shimx64.efi /boot/efi/EFI/BOOT/BOOTX64.efi
grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg
Make a copy of the Virtual Machines VHDX file first.
This is another suggestion I found, but did not try.