My Realtek High-Definition Audio Speakers won't play sound. They are not muted, so that is not the problem. I've tried everything: rebooting my PC multiple times, uninstalling and reinstalling the audio driver, updating the audio driver, disabling and re-enabling the audio device, muting and unmuting the speakers, etc. Nothing works, though! My speakers still wouldn't play audio. Why is that, and how do I fix my vexatious issue?