Make sure you’re not running any VPNs, port blockers, etc. Anything that may be keeping the controller from reaching out across your LAN to reach the speakers.

I often recommend wiring one Sonos device to the router, initially, and then remove that cable after it’s all set/connected. 

Strange this is, when I google “Sonos windows app” the first result I get is the Sonos download page. Is google that different for other people?

Thank you for your warm and thoughtful reply.

Thank you Airgetlam, Last night was a challenge. I’m using the Boost for it’s own network and it’s hardwired.  I’ll dig into it more this evening.  Thank you again.

Interesting. The BOOST should be totally transparent to this issue. Although I suppose if it is failing…might be worth testing with an Ethernet cable directly to a speaker, and temporarily removing the BOOST from the equation, just as a test.