LADIES AND GENTLEMEN,
BOYS AND GIRLS,
If you are running an OLD iPhone like me (in my case the 5c) a *very* simple solution on WINDOWS is to simply:
Uninstall ALL Apple proprietary software on your computer (including Apple application support, Apple mobile updater, etc.) (Make sure your iPhone is disconnected, of course)
Then, Google (or your choice search engine, I'm a Google man myself) "legacy iTunes" and go to Apple's old iTunes page for backwards compatibility.
Install the oldest iTunes you can for your specific device (that is compatible with your computer, i.e. if it says "old video card" and you don't have an old video card, don't get it!)
What is "old" specifically, I don't know.
Once you have removed ALL Apple software from your computer, you can begin installing the iTunes that was made closer to the time your iPhone was made. In particular, look at the iTunes release date compared with your iPhone's release date.
Upon opening the launcher, disable automatic updating.
Then, install the software and enjoy!
Hopefully works the way it did for me!