I have a dual system of Ubuntu and Windows 7 and encountered the same problem after in place upgrade from 16.04 to 16.10. I tried boot-repair before but it didn't work. Just a moment ago I tried this command and it worked:
sudo grub-install /dev/sda
I have a dual system of Ubuntu and Windows 7 and encountered the same problem after in place upgrade from 16.04 to 16.10. I tried boot-repair before but it didn't work. Just a moment ago I tried this command and it worked:
sudo grub-install /dev/sda