@Dave3 I presume you have a legitimate reason not to do a (normal) full or dual-boot install of ZorinOS, but prefer to run it inside a virtual machine. Many others do that and I think @ValiantBoy may be overlooking that valid alternative.
If you search the forum using "virtual machine" you will find many threads on the subject, including this tutorial:
Also alternatives to Virtual Box are discussed here:
I have not recentky used a virtual machine myself, but there are others here that are doing that.