package grub-pc 1.99-21ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[Cariboo1938]

Error ocurred when running Update Manager to update a new installation of Ubuntu 12.04 on my Laptop.

1)
jg@HP-Pavilion-g6-1b67ca:~$ lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04
jg@HP-Pavilion-g6-1b67ca:~$

2)
jg@HP-Pavilion-g6-1b67ca:~$ apt-cache policy pkgname
N: Unable to locate package pkgname
jg@HP-Pavilion-g6-1b67ca:~$

3)
Installable software update

4)
Error mssage: Update faiked

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: grub-pc 1.99-21ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu6
Architecture: amd64
Date: Fri Apr 27 05:21:30 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
InvalidGrubScript: /etc/grub.d/30_os-prober
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=0ccd3df4-ef2b-4c41-ae46-fc008cc5a1bb ro quiet splash vt.handoff=7
SourcePackage: grub2
Title: package grub-pc 1.99-21ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)