New answers tagged mbr
sudo update-grub the above will do the trick mostly. If not working then do the manually thing by editing Grub menu 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 edit ...
Did you run sudo update-grub after install Ubuntu? Or did you try to go to BIOS and boot from your old disk? Is windows still there or got deleted?
For some reason grub has damaged your Windows boot record. To install and run testdisk open terminal and enter sudo apt-get install -y testdisk && sudo testdisk For help using testdisk look here. And for additional information check out the forum post here. You will probably need to run boot-repair one more time after the damaged Windows boot ...
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