Check your microphone is not already in use (Windows)
Make sure that all other programs that utilise the microphone are closed or not being used. This may include pre-installed microphone applications, other video conferencing software such as Skype or Zoom, or other browsers or websites.
Note: The following steps are for Windows 10. Instructions for other Windows versions may vary slightly.
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From the Start menu, select Settings.
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Select Privacy and then Microphone.
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Scroll down to Allow desktop apps to access your microphone. Any applications that are using your microphone will have Currently in use below their name.
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Close any applications that are using your microphone and select Restart Test.
Tip: If your microphone uses a driver, you may need to visit the manufacturer's support page to update the driver.