Re: Ubuntu won't boot up
Can you boot into anything? Or just not into Ubuntu.
What you can try ... hold down a SHIFT key while booting. This should force the display of a GRUB text menu. Select the top-most Recovery Mode option. When it comes up, select the option to repair broken packages. If that completes normally, select the option to boot normally.
If all goes well, you should be back at the desktop after reboot.
Ubuntu 16.04 Mate, Mint 17.3; MS Win 8.1, MS Win10 Pro.
Will not respond to PM requests for support -- use the forums.