Open terminal (Alt+Ctrl+T) and follow the below procedure : Paste the following command in terminal sudo vim /etc/default/grub It will open a file named /boot/grub/grub.cfg file. Add GRUB_DISABLE_OS_PROBER=true at the bottom of this file. It will prevent Windows being added to your grub menu. Now to write the change, run sudo update-grub You can then run cat /boot/grub/grub.cfg to check that your Windows entry has disappeared. Restart your device to check the same.