I am currently using Ubuntu 14.04 and use it as my primary OS. I would like to dual boot over Ubuntu. Although I have read that it is preferable to do the other way round, still, I need to dual boot Windows 10 over Ubuntu.
I have read of issues with the grub and need to avoid those kind of problems.
Please provide me with a step by step solution considering that I have no experience of dual booting operating systems.
EDIT: I have tried to create a partition using GParted but have failed to do so. My drive with 912 GB cannot be resized. Here is the screenshot.