please note that QuarkXPress 9 was never supported on Windows 10, meaning that Quark didn't test this combination and also never provided support for this combination. Nevertheless we heard from many customers that they run QuarkXPress 9 with minor hiccups under Windows 10.Now Microsoft seem to have changed something in newer versions of Windows 10, which crash QuarkXPress 9 upon launch.
We believe that these changes were most likely introduced in "Windows 10 - Version 1607", however as we are not supporting this combination we do not have further details on this and also are not planning to investigate this further.
This is just an FYI, please either stay on previous versions of Windows 10. Or consider upgrading to a newer version of QuarkXPress, which is supported on Windows 10: viewtopic.php?f=23&t=27713