Some days ago Apogee announced they were dropping Windows development. I emailed Apogee and asked them about Windows Pro Tools HD users.
Here’s the answer I got.
Apogee provides a high-quality upgrade to the Digidesign 192 hardware via our X-HD card. This optional card connects Apogee X-Series and Rosetta Series converters directly to a Pro Tools core card. Since the link between Apogee hardware and Digidesign PCI cards is independent, they are not affected by this decision or announcement. Apogee will continue support for HD customers.
In other words, Windows users running PTHD with Apogee converters should be safe.
They are not so fool, after all.