First some old bad news: Apple ended support for Vista with the release of iTunes 12.2.0 on June 30, 2015. Of course many Vista users continued to run iTunes 12.1.2 or earlier versions, and some of them own Apple mobile devices.
Now the latest bad news: Apple devices running the new iOS 9 released on September 16, 2015 cannot be supported using iTunes 12.1.2 or earlier versions, so Vista users who updated their devices found themselves up a creek.
There is also good news: Just one day after iOS 9 was released, Apple heeded the outcry and rushed into release a special iTunes version 12.1.3 to add iOS 9 support for those still running "unsupported" Vista and 32-bit XP SP3: https://support.apple.com/downloads/itunes
However I have...