I was able to successfully install Ubuntu 16.04.3 LTS on my HPPavilion laptop with Windows10 as the main OS. After Ubuntu installation, it asked to restart. After restart I do not get Grub menu, and it starts Windows OS. I tried disable secure boot, and lots of other things.
Note: I cannot access Ubuntu, so cannot access Terminal for commands.
I found https://www.supergrubdisk.org/ should I use this? or is there any other option?
bcdedit /set "{bootmgr}" path \EFI\ubuntu\grubx64.efi
to show grub menu on boot. The steps are: 1) - Boot into Windows OS 2) - Combine Windows + r together and type cmd to open command prompt. 3) - Typebcdedit /set "{bootmgr}" path \EFI\ubuntu\grubx64.efi
and hit enter Once done you will start getting GRUB menu on boot.