This seems like an issue in older versions of Windows that can produce a corrupted ESP, and not a GRUB2 bug.
** Changed in: grub2 (Ubuntu) Status: Incomplete => Invalid ** Changed in: dosfstools (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to a duplicate bug report (1268157). https://bugs.launchpad.net/bugs/1090829 Title: grub-efi fails to install with Input/output error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dosfstools/+bug/1090829/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs