Restoration of Grub is very easy. All you need is the Ubuntu Live CD (you should already have it if you install Ubuntu). Boot up your live CD. In the desktop, open terminal (“Applications -> Accessories -> Terminal”). This will set it to grub mode This will locate your boot partition. If you already know the location, you can ignore this step. Replace the (hd0,0) by your boot partition number. If your Ubuntu is installed in the second partition, then change it to (hd0,1) Reboot your system. You should be able to access the Grub bootloader now.
