I am running windows 10 on a macbook pro with osx 10.11.1, using parallels 11. Very definitely in the time since I installed parallels, though I didn't notice immediately because i don't use the headphone socket very often, the headphone socket has stopped working. i tried the control / alt / p / v reset that apple told me to do (even if that isn't the exact shortcut it was something similar), didn't fix it. i hear no sound coming out of the socket in osx or in windows. I don't know when it stopped working exactly, the computer is new and it was working when i first got it.