What should I do if the win7 system is plugged into the headset?
First make sure your headset is not broken. Plug the headset into another source to hear if there is any sound (the headset must match the audio jack). Make sure the headset is not broken. Then open the control panel of your computer.
Go to <;Hardware and Sound>
Find “Realtek High Definition Audio Manager”
Find “Encryption Settings”, as shown below.
Confirm with "Check the front panel jack detection" in front of it.
You can plug in your headphones and listen to music.
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