I get an error when I try to boot with USB drive. The checksum is correct. The USB was flashed with balenaEtcher, DD and Rufus in GPT. That doesn't seem to be the problem. So I tried on three different computers, one of them has Windows 10 installed and boots the Zorin 16 normally. The others, w…

What machine are you installing on? Year, make and model? I wonder if creating the Zorin Bootable with and booting with rEFInd may help you: http://www.rodsbooks.com/refind/getting.html