Thanks again, Ramish.
I understand that some dmp and zip files arecreated by Zone Alarm. I uninstalled ZA some time ago. Those files have been deleted.
Specifically, I am asking about some *.dmp.zip files created last year by GLB113 (whatever that is) and MSMGS2d.
Again, the question: Is it safe to delete these double extension dmp.zip files???