I recently found this website - http://www.airpano.com/ that has some magnificent 360degrees aerial panoramas on it for free viewing.

A google search shows many programmes capable of making such panoramas, but does not show any method of saving the panoramas to my pc. I have tried to save them as a webpage complete without success. The link to viewing them via YouTube shows tthem being made.

How can I use W7 to save them to my pc?

The images seem to be displayed with the Adobe Flash player Plugin. I doubt you'll be able to save a local copy.