I recently tried to dual boot Ubuntu 18.04 with my Windows 10, but I messed up the installation and now I can't access Windows 10. Please note that Ubuntu is on a different HDD than Windows.
I tried update-grub, but it didn't work and the boot-repair displays the following message:
GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again.
Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.
Any ideas on how to fix that?
