Note: This issue is specific to Dell computers. If you are not a Dell computer user, see: WBX83982 - NBR Takes a Long Time to Buffer and the Downloaded File will not Play - Error: "File Format Is Not Valid"

Cause:
This is caused by certain versions of the Realtek audio driver issued by Dell.

Solution:
To resolve the issue, download the audio drivers for your operating system on the Realtek website: http://www.realtek.com/.