On Dell Inspiron Laptop, Gnome Desktop Environment, the system was dual-booted with Windows-10. On normal online periodic update by the Package Updater, the Kernel was updated.
But on reboot, I find that the Grub setting installed during original installation has been changed. The Grub Menu no longer includes Windows 10. So I cannot boot into windows.
Help needed to restore my original Grub setting. I have no idea how to edit Grub.