Bonjour Print Service does work with Windows 10.
For a time, I couldn't get Bonjour Print Services to run in my new ASUS Windows 10 PC. Guys at the Microsoft store told me to install the latest iTunes for Windows, but that didn't do anything. I could see the mDNSResponder.exe in the Programs File/Bonjour directory, and a mdnsNSP.dll and dns_sd.jar, but no Bonjour Printer Wizard.
So I went to Apple's Bonjour Support page and downloaded the latest Bonjour (v 2.0.2.0, file created 5/18/2010). I chose Run in the download dialog. After Running the install program, I found a new directory, Bonjour Print Services. Inside that directory is the PrinterWizard.exe. I double clicked that and the Printer Wizard did its thing, finding my ancient HP Hewlett-Packard Laser Jet 1012 printer. The Wizard tried to find a print driver, but none of the drivers came close. I finished up the Wizard as best I could. I then went to Windows' Settings/Devices/Printers and found a new entry for "Hewlett-Packard hp LaserJet 1012." I clicked on its properties and allowed Microsoft to find a driver, choosing the LaserJet 1015. Eventually Bonjour got the message and I was able to print on the HP LaserJet 1012 connected to my AirPort Express's usb port. When you look at the Properties of the printer installed with the Bonjour it should show you your Apple AirPort's mac (media access protocol, not "macintosh') address.