I have an iPad 3 and a 4th Gen iPod, neither of which will show up in iTunes on Windows 10 Anniversary Update. I've tried two different sync cables and 3 different USB ports, and I've re-installed iTunes. Apple Mobile Device Service, Bonjour Service, iPod Service all running, but iTunes does not open automatically when I connect a device.
Both of these devices spend most of their time in very specific roles (iPad sits in a kiosk as a print-release station for a copier, the iPod connects to our PBX via the headphone jack for music on hold — long story there) and only rarely come back to my desk to sync. Both synced without issue about 4 1/2 months ago. I am able to use Windows Explorer to browse the pictures stored on both devices as if they were digital cameras (the iPad prompts me to Allow this first) and they both show up in the "Portable Devices" category in Device Manager with reasonable names.