You try to install Ubuntu in EFI mode, but you don not have an EFI- System-Partition.
If you wish to have a dualboot with Windows, please check first in which mode Windows is installed. ** 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/1704481 Title: Crash on unbuntu 16.04.2 install from USB to External HDD To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1704481/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs