First I installed Windows on just one partition (no others were created) following one partition windows installation, because I wanted to maximize the number of possible primary partitions.

When I installed ubuntu I got:

grub-efi-amd64-signed failed installation /target/ 

So grub failed to install.

On all installations I used lagacy support enabled on UEFI mode on a HP laptop.

How to solve it?

1 Answer 1


On Ubuntu bootable USB I used boot repair, then Ubuntu appeared as an option.

I entered on ubuntu and used boot repair again, then grub identified Windows

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.