Exactly. Because when I plug them in, it's like I never did at all, because I still hear it perfectly fine through the actual speakers. Nor does anything else show up in the playback devices when I look at the sound stuff, it's just the speakers. If I plug the headphones into the microphone spot, it at least makes "stereo array" or something show up, but obviously still has no effect.
I have an Acer Aspire 5750, and it runs Windows 7. I don't know if it's some kind of weird drivers issue or what, because everything I've searched and read about, the headphones volume etc. would at least show up, even if only by show disabled devices or something. This doesn't even show up. And I don't want to just mess around with the drivers willy-nilly, since I have no idea what I'm doing.