Looks like a Samasung thing. I first saw it on my Galaxy s3. Very annoying as I rarely plug headphones in to any device I own. I usually plug in a real speaker system, sometimes even concert sound systems (live audio engineer by trade). As soon as I can
confirm, I'll update this post. My Samsung laptop, NP680Z5E-X01US does this no matter what I plug into the "headphone jack" and I don't even have to be running audio. From a fresh boot (startup) plug ANYTHING into the hole and try to turn up the volume. DOH!
It stops at 39, removes any fullscreen, darks the display, and shows a stripe on top of everything else that says, "High volume can cause hearing loss Your ears are important. Turning up the volume past this point can cause hearing damage." With two options,
"allow" and "don't allow" and the warning does not go away until you chose one.
-IF YOU OWN ANY SAMSUNG PRODUCT THAT DOES THIS, CALL 800-SAMSUNG AND COMPLAIN!!!! SAMSUNG WILL CONTINUE TO SCREW US, LIKE THIS, UNTIL WE DO.
Good luck.
Windows, do more, pay less.
P.S. don't try to remove/rollback drivers on a Samsung computer, it will break it.