Apple provides this link to download and install Bonjour.
After installation, it includes 2 products - the
Bonjour Service itself and
Bonjour Print Services.
Is is possible to install only the
Bonjour Service for Windows?
Using that linked package, I opened up BonjourPSSetup.exe in WinRAR and was able to extract Bonjour.msi from it (you could use Bonjour64.msi on 64-bit I guess).
It's then possible to install from Bonjour.msi - I haven't fully tested it through to completion myself but hopefully that would be a way for you to install the Bonjour Service without the Bonjour Print Services.