Suppose, I have a machine with UEFI and GPT-partitioned hard drive. I have an Ubuntu system installed on it and GRUB2 in UEFI system partition.
Then I install Windows 10 and its boot loader to UEFI system partition as well. Will GRUB2 see the new Windows boot loader and allow me to chainload it? (Probably not?)
So, I'll probably have to update GRUB2 after installing Windows, if I want to chainload Windows from GRUB menu?