If your Zune HD is frequently having issues or coughing up nasty errors, it may need the firmware reinstalled. By using this method, you can reinstall the firmware without deleting your current content.
1. Power on your Zune HD media player.
2. Press and hold the on/off button (on top of the device) and the media button (on the face of the device) simultaneously for 15 seconds. The device will enter recovery mode.
3. Connect your Zune HD to your PC.
4. Start the Zune desktop software.
5. You will be prompted to install the firmware, follow the instructions. Once completed, your Zune HD should be running like a champ, with your content still intact.
