Use windows explorer to navigate to the iso location, hold shift and right click in the directory. Choose open command line/powershell here.
Type:
certutil -hashfile [zorin-iso-file-name].iso SHA256
Change out [zorin-iso-file-name].iso to the name of the actual file (zorin-16-core-pro.iso) i think. It will return the value. Compare to the one i provided.