sudo update-grub

gksudo gedit /boot/grub/menu.lst


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sdb1
title Windows 7
root (hd1,0)
savedefault
makeactive
map (hd0) (hd1)
map (hd1) (hd0)
chainloader +1

sudo apt-get install ntfs-config

sudo ntfs-config