I've just installed Kubuntu, now i added other HD with Windows and i need GRUB to be able to select between the two O.S. What's the easiest to do it? thanks!
sorry for delay post as you already done it so now backup your (ie copy paste) your /boot/grub/grub.cfg grub.cfg file i mean https://help.ubuntu.com/community/Grub2 also second help is install Boot-Repair it give you gui way see above one also many others way like you did from one )