Don’t know about the Airlink2, whether its firmware has been updated to be equivalent to the latest Noahlink Wireless but I’m running Smart Fit v1.11 using a Noahlink Wireless with the latest firmware, AFAIK, and when one goes to install Smart Fit, an install dialog lists the minimal and preferred hardware and Windows OS requirements. Windows 10 is the OS recommended by ReSound and has been for a number of Smart Fit versions. Windows 10 has worked great for me but I’ve only done minimal fitting adjustments, mainly picking my degree of user experience, fitting algorithm, feedback control, experimenting with different domes and different amounts of venting in custom molds, recalculating program fits, etc.