Summary so far for anyone who reads this:
- HD-6000 has autofocus issues that make it largely non-functional (as of 3.22 drivers). I've now found several other web articles that cite this, with no fix. Shame on me for not doing good research before purchasing.
- Help from Microsoft is basically non-existent, see string of notes above. Still no contact with anyone who can provide meaningful assistance. Cannot gain access to hardware support team. Only option is to pay $35/hour to fix a brand new $50 device.
- Next action: Return product, review badly online, buy Logitech. Spread the word.