The first two messages only say that the manufacturer did not fully complete their ACPI tables, causing Zorin OS to fallback to generic assumptions. IT is harmless and can be ignored.
The third one can be caused by a few different factors, none major. Secure Boot is a likely culprit if it is enabled. It can cause the GDM display manager to hesitate during init.
All can be removed from view by adding the grub parameter loglevel=3 to grub: