Can not activate the sound

I have a HP Pavilion dv7 1232nr. Everything has been working great until two days when I realized that the mute button at the top of the laptop is RED (silent) and I can't seem to "reactivate" it or change the volume using the key above the keyboard.

When I go into Control Panel, Manager of devices, it is said that everything works correctly. My headphones will work, but other that that, I can not all sound from the internal speakers. I see green bars move when I music, etc, but I am unable to hear it without a helmet.

I spoke with a colleague and she said her daughter has had the same problem and they had to download something, but she can not remember what it was.

Anyone able to help? Thank you in advance.

The sp41479 is this driver. :-)

Tags: Notebooks

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