Reinstall GRUB using a Live CD
How to reinstall the Grub using a (any) Live CD: sudo grub A
grub> prompt will appear find /boot/grub/stage1 A list of all
Linux grubs that were found will be displayed. Use the one that
matches the partition of the grub that is being fixed. Examples:
(hd0), (hd0,2) Use whatever the computer spits out in the next
commands. If it was (hd0,2) then the commands would be: root
(hd0,2) setup (hd0,2) A bunch of lines appear with "Checking..."
and "Running..." The 2nd last line should read "succeeded" and the
last line should read "Done." quit Restart the system and remove
the bootable CD.