What should I do if there is echo or feedback in the speakers?

To fix echo or feedback, you need to adjust the audio levels in Windows Sound settings. For Windows 10, right-click the speaker icon in the system tray and select Sounds, then adjust output levels on the Playback tab and input levels on the Recording tab. For Windows 8.1 and Windows 7, similar steps are followed through the Control Panel and Sound settings to configure both speaker output and microphone input levels.