No additional software is required to run Screen Share. 
 
We do offer optional Screen Share app, which we highly recommend installing to improve the content sharing experience. Without the Screen Share Application, you would need to manually display the incoming video feed using a third-party application.
 
NOTE: When using a Windows 7 computer, we recommend that you download and install the Screen Share Application from Logitech, as Windows 7 does not fully support USB 3.0.