We are aware of OS issues with certain bluetooth configurations (details: https://support.coscreen.co/hc/en-us/articles/1500002060342-...) and a Windows problem with a buzzing noise (more: https://thegeekpage.com/how-to-fix-audio-buzzing-in-windows-...) but those seem to be different problems. Drop us a note at hello@coscreen.co and we'll try to help...