Thank you for taking the time to report this bug and helping to make Ubuntu better.
According to https://launchpadlibrarian.net/164591407/UbiquitySyslog.txt you've an inconsistent ntfs partition, that's probably the reason why the installation didn''t continued and the whole process failed. Run chkdsk /f on Windows then reboot it twice and retry the installer, I'll mark in the meantime the bug as invalid. Thanks! --- Ubuntu Bug Squad volunteer triager http://wiki.ubuntu.com/BugSquad ** Changed in: grub-installer (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1275392 Title: grub dummy failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1275392/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
