I have a 16GB USB for ISO image, a 64GB USB for installation of Ubuntu 16.04 on window 8.1 as an external drive. My internal harddisk has C: and D:
After enter 'Try Ubuntu' then click 'Install Ubuntu'. My boot priority set to external drive then internal drive. Boot secure and fast start up disable.
My 64GB partition as follows:
- (6GB primary, ext4, swap)
- (500M logical EFI)
- (remaining GB logical, ext4, mount as /)
Boot loader set as the EFI in my 64GB USB drive
Tried few time to install Ubuntu, it stopped at:
grub-efi-amd64-signed package failed to install into/target/
Even I tried to repair the boot loader and followed most of the post but none can fix it.