1. Boot to the LiveCD Desktop 2. Open a terminal 3. Determine the partition with the Ubuntu/Mint installation. sudo fdisk -l If the user isn't sure of the partition, look for one of the appropriate size or formatting. 4. Mount the partition containing the Ubuntu/Mint installation. sudo mount /dev/sdXY /mnt Example: sudo mount /dev/sda1 5. Run the grub-install command as described below. sudo grub-install --root-directory=/mnt/ /dev/sdX Example: sudo grub-install --root-directory=/mnt/ /dev/sda 6. Reboot 7. Refresh the GRUB menu with sudo update-grub