1) Go here ftp://ftp.logitech.com//pub/techsupport/gaming/ and download lgs840.exe or if you have a 64-bit Operating System download lgs840_x64.exe 2) Exit LGS from the System Tray. 3) Uninstall LGS 4) Go to "C:\Users\%USER%\AppData\Local\" and delete the Logitech folder (now you can navigate inside and try to just delete the settings.json but you have to do it after uninstalling, or else the uninstall will create a new one.) 5) Open Device Manager (Start > Control Panel > System and Maintenance > Click Device Manager) 6) Expand Sound, video and game controllers 7) Right click "Logitech G35 Headset" or "Logitech G930 Headset" 8) Click Uninstall 9) You should now be prompted to restart your system. 10) Once restarted, unplug your headset from the USB port and install the lgs840.exe or lgs840_x64.exe 11) Plug in headset and test out.