Ubuntu 14.04 install: grub-efi-amd64-signed failed to install into /target/
Is there any way to delete all the references to Ubuntu from the EFI partition?
- Boot via Live CD/USB
- mount the EFI partition
- delete the Ubuntu folder from the partition
... but, I would use Disks from Ubuntu Live to backup the partition to ISO first. So when you feel re-invigorated you can try bcdedit from within Windows. My HP Laptop will now no longer boot to Ubuntu without me changing the path of bootmgr as shown in the first answer here
As long as you have a backup of your EFI you can always return to prior state.