No Sound After Installing Windows Vista Service Pack

Affected Products: Software
Affected Operating Systems: Windows Vista™

ISSUE: There is no audio output from the SigmaTel sound card after completing the process for a Windows Vista® Service Pack installation. On the taskbar, when hovering over the speaker icon, the message "No Audio Output Device is Installed" is displayed and there is a red X beside the speaker.

RESOLUTION: Remove the SigmaTel audio driver through Control Panel, restart the computer, and then reinstall the driver.

Remove the driver: These steps must be followed to remove the SigmaTel Audio driver:

  1. From the Windows Vista™ default Start menu, click Control Panel.

  2. In Control Panel, click Uninstall a Program.

  3. In the Programs and Features window, select SigmaTel Audio, and then click Uninstall.

  4. In the User Account Control dialog box, click Continue.

  5. In the Confirm Uninstall dialog box, click OK.

  6. In the Configuring SigmaTel Audio Driver and Applications dialog box, click Finish.

  7. Restart the computer