How to set Windows to boot as the default in the grub boot loader
search :
/boot/grub/grub.cfg
and find something similar :
Windows NT/2000/XP (loader) (on /dev/sda1)
edit :
/etc/default/grub
and change to:
GRUB_DEFAULT="Windows NT/2000/XP (loader) (on /dev/sda1)"
finally run :
update-grub
References :
http://askubuntu.com/questions/52963/how-do-i-set-windows-to-boot-as-the-default-in-the-boot-loader