grub2 - Ubuntu-Windows10 dual boot - Ask Ubuntu

i new here , need in order solve problem. yesterday decided make partition on laptop (hp pavilion 15-b103 (5i-3337u/4g/500gb)) , install ubuntu 16.10. laptop runs windows 10. ok in installation problem can't make dual boot..i mean choose operating system when laptop boots. tried on goolge (disable safe mode, run repair boot on ubuntu, enable legacy mode, bios etc.) still boots directly windows 10!!! can please tell me how fix it? want start using ubuntu don't want delete windows. ps: have try find answer here , applied solutions nothing worked :( thank in advance guys

these complete steps need have windows , ubuntu on boot menu, need live disk go terminal. after boots go terminal , enter following command: sudo fdisk -l

this command show partitions on hdd, have know partition linux distro installed on (gparted can great in that).

use gparted see linux installed

and enter command:

sudo mount /dev/sda1 /mnt 

then command:

sudo mount --bind /dev /mnt/dev 

then command

sudo chroot /mnt 

then command

grub-install /dev/sda  

then command

update-grub   

if computer boots directly ubuntu (or whatever linux distro have) go terminal , enter:

sudo update-grub   

finally reboot , have grub menu both linux , windows!