Heaphones & speakers play audio simultaneously

[DarkSouls]

There are a lot of similar question but they don't help.

Headphones don't show up in playback devices. When I plug in my headphones they don't mute the speakers. I have windows 7 and a lenovo T430s laptop.

 

[Ironhide CPU]

I've had similar experiences with this on my desktop running Windows 7 as well...One solution is unplugging the speakers from the audio jack, and plugging your headphones into it. It's quite a hassle though, as the audio jack you're using might be on the back of the computer and will be tough for a headphones cord to reach. If you can't do that solution, I've found that simply removing it and plugging it back in several times worked too.