You try to install Ubuntu in UEFI mode, but you do not have an EFI-System-Partition. But if you have Windows installed on disk, you will not get a working dualboot. For a working dualboot, you have to install Ubuntu in BIOS mode.
If you like to install Ubuntu in UEFI mode, add an EFI-System-Partition. If you like to install Ubuntu in BIOS mode, you have to start your installation medium in BIOS mode. ** Changed in: grub-installer (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1672466 Title: grub installation failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1672466/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs