Hi @JTM79.
Welcome, thank you for reaching out to Sonos Community, We appreciate your time and effort in posting your concern here in our community.
Try to re-download the application again on the Sonos website.
Check if the firewall or anti-virus might be causing the problem, verify also if theirs any pending updates with your windows 10 software.
Let us know if it works. If you need help with any other information, please be sure to let us know.
@Mark P
Downloaded “SonosDesktopController1124.exe” again. Same exact file (checked hashes).
No Windows Updates pending.
Microsoft Defender did not flag the downloaded file or installed files.
Tested with Firewall off, same problem.
Curious if you’ve rebooted your computer?
Hi @JTM79.
Thank you for reaching back out to Sonos Community.
Yes try restarting your pc, but if it still doesn't work.
I would like to recommend calling our customer phone support on this so you can be assisted with more thorough and in-depth troubleshooting steps
Let us know if it works. If you need help with any other information, please be sure to let us know.
Hi @JTM79
Did you get this fixed? If not, I recommend you try uninstalling the app again, but before reinstalling once more, delete the following folder from your system:
C:\Users\syour username]\AppData\Local\Sonos,_Inc
Note that AppData is a hidden folder, so you either need to tick the “Hidden Items" box on the View toolbar, or add \AppData to the path above the folder view.
For Mac users, these folders should be deleted:
~/Library/Application Support/Sonos
~/Library/Preferences/com.sonos.macController.plist
/Users/Shared/Sonos/Shares.plist
Once done, reinstall the app and open. If the same problem occurs, please get in touch with our technical support team.