I’ve looked at other post on the form with similar messages but I don’t understand the solutions given. Any help that could be given with step-by-step instructions would be great.
Sorry to hear of your issues with Virtual Box. Have you installed the Extension Pack? In the past I always recommended getting the latest .deb package fro the official site as the ones that get bundled with Zorin aren't the latest, plus the associated Extension pack. That said I no longer use Virtual Box having had a better experience with virt-manager which is what I use for my videos. You will need to install Synaptic Package Manager to do so. If you do go down the route of virt-manager (Virtual Machine Manager) I recommend you create a new pool in /home as by default, virt-manager wants to store VM's in /var which can soon get filled up.
Thanks for your response. I thought I'd disabled secure boot but I checked again and it was still enabled. So now, the virtual machine starts but gets an error that AMD-V is disabled. I looked for virtualization in the BIOS but was not sure what it was called. Will look for AMD-V now.