Hi Steve,
I would suggest you to follow the steps provided and update us on the status of the issue.
**Method 1: Step 1:**No audio from USB headset: http://logitech-en-ap.custhelp.com/app/answers/detail/a_id/32390/section/troubleshoot/crid/407/lt_product_id/10000/tabs/1,3,2,4,5/cl/in,en
**Step 2:**If you don't hear any sounds coming from an audio device you've plugged in to one of the jacks on your computer, follow the instructions below.
**Method 2:**I would also suggest you to update sound card driver for hardware and check if the issue still persists.
Update a driver for hardware that isn't working properly:http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isnt-working-properly
Additional information: Tips for fixing common sound problems http://windows.microsoft.com/en-us/windows7/tips-for-fixing-common-sound-problems
For any Windows related issues please feel free to contact us and we will be glad to help.