Restore Grub

Boot from the Live CD (Ubuntu of course) and open a terminal.

For Grub

Then type:

sudo grub

At the grub> prompt type:

find /boot/grub/stage1

This will return a location. Whatever was returned use for the next three commands. Substitute ? for the number ie hd0,1 Enter:

root (hd?,?)

Enter the command to install grub to the mbr

setup (hd?)

Then quit

quit

sudo fdisk -l

Locate your linux boot from the list eg sda2

sudo mount /dev/sda2 /mnt
sudo grub-install --root-directory=/mnt /dev/sda