Hello Edward,

Be sure to not have your audio resources, used by another application. Basically the audio resource should be available for the "local" softphone running in the background.

If you still have issue with windows 10, I invite you to open a support ticket : support@innovaphone.com

be sure to have :

up to date innovaphone system with latest v13r3 service release

up to date windows 10 machine

Best regards,

Jérémie Bidal