Re-installing Zorin and changing the partition size

[zabadabadoo]

Are you intending to dual-boot ZorinOS Core alongside Windows?

If you install ZorinOS using the "Something Else" method, that should allow you to set partition sizes manually. I will try and search for a tutorial for you.

EDIT: Here is one of my old posts where I refer to an even older Tutorial for the "Something Else" installation method. It has always worked for me.

Help me! update error

I am not sure if your attempt to direct update has harmed your personal files in /home partition. If not then you can use the "Something Else" method to re-install Z15.3 Core, or if you wish Z16 Core if you have a bootable USB containing that. I always use Wolfman's (old but good) guide to using the "Something Else" method to install ZorinOS. Here is link to it on the old Forum archive. Install Ubuntu (Zorin OS) using the "Something Else" method - Old Zorin Forum archive