Check your anti-virus, it might be blocking it.
The Windows installer will usually give an bogus error message (has done for months) but it isn’t blocking and setup should finish and the app work.
If problems persist, try my Windows apps from the Store.
Hi @sicross
Welcome to the Sonos Community!
Sorry to hear of this issue you are having with the Windows Sonos App.
I recommend you get in touch with our technical support team who have tools at their disposal that will allow them to give you advice specific to your Sonos system and what it reports.
I hope this helps.