sudo fdisk -l
sudo mount /dev/sdaX /mnt # sdaX is the partition that has Ubuntu
for i in /sys /proc /run /dev; do sudo mount —bind «$i» «/mnt$i»; done
sudo chroot /mnt
update-grub
grub-install /dev/sda #(—force) if need
sync
reboot
I had the same problem and I fixed it by standing on the Windows 7 loader drive and press E to edit.
My insmod was set to ldm and the set root was set to /ldm/(lotofhexnumbers)/volume1.
So I edit these two lines and press Ctrl+X this will boot but will not save this is just for testing.
insmod part_msdos
set root='(hd0,msdos1)’
If it works for you, boot back in to Ubuntu sudo gedit /boot/grub/grub.cfg.Look for menuentry the name of your boot profile, edit the lines below and save, reboot and selecting the Windows will boot normally.
insmod part_msdos
set root='(hd0,msdos1)’