Thanks for you help people the bootable usb worked with the new release iso and using etcher. Installed and running on a second hand lenovo pc for now but will try installing on some NUCs and see how it goes.
Cheers, are you running Virtual Box to run VitalPBX on that or is it directly installed?
Thanks will give it a go.
Is there any particular NUC/Aplliance/Mini PC that is prefered/works with VitalPBX (without using a VirtualBox) or any that doesnt work with it?