If your goal is simply to open old files (not to use the old software), consider these options before hunting down v7.0:
This feature helped ensure consistency across projects by allowing users to define and share layout specifications. Modern Compatibility and Legacy Download QuarkXpress 7.0 for Windows
If you hold a valid support contract for a modern version of QuarkXPress, log into your official Quark account. Navigate to “My Products” and look for a “Legacy Downloads” section. Support agents can sometimes grant access to version 7.0 installers if you provide proof of an old CD key. If your goal is simply to open old