Boot Repair

[SealLion]

Boot-Repair is a simple tool to repair frequent boot issues you may encounter in Ubuntu like when you can't boot Ubuntu after installing Windows or another Linux distribution, or when you can't boot Windows after installing Ubuntu, or when GRUB is not displayed anymore, some upgrade breaks GRUB, etc.

More information here:

https://help.ubuntu.com/community/Boot-Repair

Additionally,

Easy-to-use (repair in 1 click ! )
Free (GPL open-source license)
Helpful (Boot-Info summary to get help by email or on your favorite forum)
Safe (automatic backups)
Can recover access to Windows (XP, Vista, Windows7, Windows8).
Can recover access to Debian, Ubuntu, Mint, Fedora, OpenSuse, ArchLinux...
Can recover access to any OS (Windows, MacOS, Linux..) if your PC contains Debian, Ubuntu, Mint, Fedora, OpenSuse, ArchLinux, or derivative.
Can repair MBR-locked OEM computer boot if the original bootsector has been saved by Clean-Ubiquity
Can repair the boot when you have the "GRUB Recovery" error message
Options to reinstall GRUB2/GRUB1 bootloader easily (OS by default, purge, unhide, kernel options..)
and much more ! (UEFI, SecureBoot, RAID, LVM, Wubi, filesystem repair...)

More information here as well:

boot-repair / Home / Home

[SealLion]

Of course, don't forget this link here too for anyone that is ever interested in knowing. I came across this at the Ubuntu forums. I think it's pretty helpful if you don't want to use the .iso file for boot-repair or don't want to download the program. YOu can always use the Live CD and follow the instructions given therein at this link> How to Repair/Restore/Reinstall Grub 2 with a Ubuntu Live CD · how to ubuntu