First thing I would point you to is this: Before you install
Assuming you created a bootable USB stick with a verified (SHA256 checksum matches published value) .iso, Were you able to use the Live USB in "Try Zorin" mode at all?
EDIT: I have now seem a similar post from you (Burning on a DVD-ROM is not possible ) which talks about using a DVD for installation. Was that what you were doing here i.e. not using a USB stick?
If so, please do not post multiple times with the same subject, as that gets us all a bit confused when trying to understand and help you.
Keep using this thread. Thanks zab.