Proper Dual-boot w/ Windows 10 and Zorin core

Hello, here’s what I want :
-A proper Dual boot with Windows 10 and Linux
-Grub 2 as the first “program” launched
-no more problems

Big thanks to those who’ll answer!

@Daitan, Hi and welcome to the Forum.
What you are asking for is the normal standard regime for Dual-booting Zorin and Windows.
You will see Grub2 menu initially to allow you to select which OS to boot, normally defaults to Zorin if you do not make a different choice before the timeout.
Have a look at the unofficial Zorin 15 manual by Swarfendor which has section on installation
here: Unofficial Manual for Zorin 15
Also see this post by @carmar: Partitioning during installation
and: USB boot install

What happens on this issue where I have Zorin 16 installed, and then I had to reinstall Windows 11 on another part of the SSD and now windows takes the boot and I can't reach zorin. How do I return to the default Zorin duel boot menu ?

Sorted. I found I had to go into the BIOS and reorder the boot ordering to put windows second .

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