Norton GoBack is no longer available. They now have Save & Restore 2.0 in their Sytemworks 12.0 Premier Package. The last actual seperate GoBack was Norton GoBack 4.?? and is available still at Amazon.com for 49.99, but is not for Vista.
GoBack has been available over the years as Roxio GoBack, (which happened to come on Norton Systemworks 2002) as well as being available seperately from Roxio. There was also Adaptec GoBack.
For fans of GoBack, which I was for a number of years, look into Rollback RX. It's compatable with Vista and a very good product.