Even a "Download from Internet" will only download what you need. If your machine has an up-to-date Cygwin installation then you don't need anything and so nothing (except the current setup.ini) will be downloaded.
There are ways of downloading an installation set that involve temporarily blinding Windows to your installed Cygwin. Not difficult. Discussed on the mailing list at various times ... can be more specific if you want. Fergus -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/