package grub-pc 2.02~beta2-9ubuntu1.7 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 10

[Ryan Dunlop]

Machine wouldn't boot after restart from Windows 10. Went though boot-repair using live usb image. These wanted to report after next boot.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: grub-pc 2.02~beta2-9ubuntu1.7
ProcVersionSignature: Ubuntu 3.13.0-86.131-generic 3.13.11-ckt39
Uname: Linux 3.13.0-86-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.20
AptOrdering:
 grub-pc: Purge
 grub-gfxpayload-lists: Purge
 grub2-common: Purge
 grub-pc-bin: Purge
 grub-common: Purge
Architecture: amd64
Date: Tue May 24 11:12:34 2016
Df:
 Filesystem 1K-blocks Used Available Use% Mounted on
 /dev/sdb5 313281216 88359060 208985288 30% /
 udev 8046120 12 8046108 1% /dev
 tmpfs 1611524 1408 1610116 1% /run
DpkgTerminalLog:
 Removing grub-gfxpayload-lists (0.6) ...
 Removing grub-pc (2.02~beta2-9ubuntu1.7) ...
 dpkg: error processing package grub-pc (--purge):
  subprocess installed pre-removal script returned error exit status 10
DuplicateSignature: package:grub-pc:2.02~beta2-9ubuntu1.7:subprocess installed pre-removal script returned error exit status 10
ErrorMessage: subprocess installed pre-removal script returned error exit status 10
InstallationDate: Installed on 2014-11-22 (548 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-86-generic root=UUID=b570f2fe-32f6-478e-a0e7-bd6c5d64f130 ro quiet splash
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.6
 apt 1.0.1ubuntu2.13
SourcePackage: grub2
Title: package grub-pc 2.02~beta2-9ubuntu1.7 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 10
UpgradeStatus: No upgrade log present (probably fresh install)