Open a terminal:
Make backup copies of the main GRUB 2 folders & files. (Optional)
sudo cp /etc/default/grub /etc/default/grub.old
sudo cp -R /etc/grub.d /etc/grub.d.old
sudo cp -R /boot/grub /boot/grub.old
Remove GRUB 2
sudo apt-get purge grub2 grub-pc
The system will be unbootable until another bootloader is installed.
Once the packages are removed, many files will still remain in ‘/boot/grub’
Install GRUB 0.97
sudo apt-get install grub
With grub installed, the user must still create the menu.lst and stage1/stage2 files by running the following two commands.
Generates menu.lst ; Tab to “Yes” when prompted.
sudo grub-install /dev/sdX
Choose the correct device (sda, sdb, etc), normally the one on which Ubuntu is installed.
Creates the stage1 & stage2 files in /boot/grub and writes to the MBR.
Run this command to keep it from upgrading automatically:
echo "grub hold" | sudo dpkg --set-selections