Bonjour is a program/feature that locates devices via a local network. I don't know much about it, especially not on a Windows. From what I can understand, upon installing an application that uses Bonjour on a Windows, it will be installed not just for printing. For example, a friend of mine installed iTunes on their Windows laptop and it also installed Bonjour. At least that's what they said. As I implied— I know Mac way better than I do a Windows.
I did find some links regarding Bonjour and Windows.
http://guides.macrumors.com/BonjourBonjour: Frequently asked questions (FAQ)Bonjour for Windows: How to tell if it successfully installedMy recommendations eManga-wise is to make sure your device, temporarily for syncing purposes, has the auto-lock set to "Never." Sometimes after your device locks it will disconnect. At least I think so. I just know that when I'm syncing a large number of files setting auto-lock to "Never" keeps the app from passing out on me.
I also suggest syncing a handful of files at a time. Like 5 or 7. Also, making sure those files are below 20(
?) mb seems like a good idea.
That's all I've got for now. Hope it helps? ^^;