grub rescue> ls grub rescue> (hd0,msdos2) (hd0,msdos3) (hd0,msdos4) grub rescue> ls (hd0,msdos2)/boot/grubIf the above listing returns stuff you found the right partition
Rescue
grub rescue> set prefix=(hd0,msdos2)/boot/grub grub rescue> set root=(hd0,msdos2) grub rescue> insmod normal grub rescue> normal grub rescue> insmod linux grub rescue> boot
now the grub menu should come up
boot into Ubuntu and install boot-repair
$ sudo -s # add-apt-repository ppa:yannubuntu/boot-repair # apt-get update # apt-get install -y boot-repair
boot repair
# boot-repairthe first option worked for me
grub rescue dual boot Ubuntu-Windows10 system after windows10 update