To finish, go to the BIOS again, set a password, enable 'Secure Boot', remove password and reboot. Without problem, nor Neon neither Windows (In this computer I had Windows 10 too). Install KDE Neon again, without problem, and reboot computer. Go to 'Security' again and remove password (setting an empty password). In my case, ACER R3, go to BIOS, set a password in 'Security' tab, go to 'Boot' tab and disable 'Secure Boot', which isn't possible if you hadn't set a password first.

It could be a bug?īut I'd got an easy solution that has worked for me and I'm going to explain to be help for others.Īs simply as deactivate 'secure boot' in the BIOS. Why the first installation OK and not the rest? I don't have any idea. In all the times I'd chosen a manual mounting and formatting partitions. It wasn't matter if I had checked 'Install Third-party software.' or not, if I had had a Internet connection or not, etc., as I've read. I installed Kubuntu as I'd said and not problem. But I realized I'd committed some error, it doesn't matter what was, and I tried reinstalling and I had the error. I had installed KDE Neon the first time and everything finished OK. I got a first installation OK but when I tried reinstalling the same OS I had that error. Without the GRUB boot loader, the installed system will not boot'īut, it's important, not ever.

'The 'grub-efi-amd64-signed' package failed to install into /target/. In fact, I've had tried installing Kubuntu 18.04 with the same error: I've had an error during an installation of KDE Neon.

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