I’m surprised nobody said anything about this, but I guess it was apparent when some of my co-workers were asking me what I was listening to when I had my headphones on. Nobody should have been able to hear my music. I just realized it today when I took my headphones off and noticed the sound from the speakers. I don’t turn up the music loud, so it wouldn’t have came from the headphones.
What can I do about this? Note that this is a work PC, so some settings might be restricted. The PC is a Dell Optiplex 380, and it’s got a Realtek sound device in it.