Verify

• Verify your HD audio driver is valid in the device manager utility. This is found by right-clicking the "My Computer" icon in Microsoft Windows XP, then "Properties," "Hardware" and "Device Manager." In newer operating systems, the device manager is found by clicking "Control Panel," "System and Security." Check device manager for a question or exclamation mark in the HD Audio section. If there is one, you either have the wrong driver of none at all.
  
  

Repair

• Run a complete spyware and virus scan. To repair the driver, use the roll-back option in device manager to repair invalid updates. If this is unsuccessful or you have never updated the device, click the "Update" tab in the same utility. Check Windows' Optional Updates for any relevant media-oriented updates as conflicts can arise from Windows Media Player. Do this by clicking "Start," "All Programs," "Windows Updates" and the "Custom" button.
  
  

Replace

• Replace the driver if necessary. Download new drivers directly from the sound card's website or install them from your original disks and update the drivers as necessary. Avoid driver scans from third parties as they often contain malware.