Could you please provide more information about the issue?
- What browser and its version is used on the desktop machines where the problem is reproduced?
- If the browser does not support HTML5 <audio />does it have quick time plugin installed that is required for the Captcha's audio code to play?
I believe the item that is downloaded is the captcha's audio code file, and this is expected behavior, because the browser has to request the audio file before actually it is played.
the Telerik team