The adapter is used with Polar software running on a PC to configure the heart rate monitor (e.g., training zones, workouts, clock, etc.) and to download workout sessions.
Although Windows 10 is a great upgrade for many people (especially those who have suffered through Windows 8 or 8.1), Microsoft made a change that will affect athletes using any Polar heart rate monitor (such as the RS800CX) that uses the Polar USB IrDA Adapter.
