sudo nano /etc/default/grub
Make sure this line has the adddtional details removed to look like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Then update grub, reboot.
sudo update-grub
if your grub configuration is still trying to use an OEM kernel and you would like to reset grub to it's conf defaults.
Click here --->: Bring grub back to default, use latest kernel installed.