Yes! Thank you that is exactly what did the trick.
I will post the commands here to help those experiencing the same problem in the future:
sudo apt-get remove linux-image-4.13.0-26-generic && sudo apt autoremove -y
sudo update-grub
Reboot
and also
edit its configuration at /etc/apt/apt.conf.d/50unattended-upgrades.
You can selectively disable individual APT sources to auto-update, by commenting out corresponding sources in "Unattended-Upgrade::Allowed-Origins":
Unattended-Upgrade::Allowed-Origins {
"${distro_id}:${distro_codename}-security";
// "${distro_id}:${distro_codename}-updates";
// "${distro_id}:${distro_codename}-proposed";
// "${distro_id}:${distro_codename}-backports";
};