https://help.ubuntu.com/community/Grub2

GRUB2 default option

• sudo gedit /etc/default/grub
• change
• GRUB_DEFAULT=0
• to e.g.:
• GRUB_DEFAULT="Microsoft Windows XP Professional (on /dev/sda1)"
• or to e.g.:
• GRUB_DEFAULT=saved
• (although needs: GRUB_SAVEDEFAULT=true; but can't find that option?!)

GRUB2 upgrade