When I plug my headphones into the rear jack of my computer (there is no front jack) the speaker portion works fine. It's the microphone that does not work. The computer has no problem detecting the microphone and it says that it is working properly. The mute on the headphone set is not turned on, nor any muting button on the computer. I have Windows 7 pro installed. I've have updated the Microsoft drivers and still did not work. I then tried the Realtek drivers and updated them as well with no success. The headphones work perfectly on my other computer.