Reference: link
- Boot the Desktop/Live CD. (Use Ubuntu 8.04 or later)
- Open a terminal (Applications -> Accessories -> Terminal)
- Start grub as root with the following command
- sudo grub
- You will get a grub prompt which we will use to find the root partition and install grub to the MBR (hd0)
grub> - Type the following and press enter:
find /boot/grub/stage1 - If you get "Error 15: File not found", try the following:
find /grub/stage1 - Using this information, set the root device (fill in X,Y with whatever the find command returned):
grub> root (hdX,Y) - Install Grub:
grub> setup (hd0) - (In case you want to install GRUB to another drive (like hdX) use the above command as 'setup (hdX)' and then continue)
- Exit Grub:
grub> quit - Reboot (to hard drive). Grub should be installed and both Ubuntu and Windows should have been automatically detected.
- 6. If, after installing grub, Windows will not boot you may need to edit /boot/grub/menu.lst