Bad sound card/motherboard? background noise even when mic is plugged out.

[Mattriz]

Here is an audio file with the microphone plugged out so its not recording any sound.

https://soundcloud.com/mattriz1/micoff

Do i have a bad sound card/motherboard or is there something else that is wrong and is there anyway to fix this?

To clarify im using the on board sound on my motherboard (P6X58D-E)

 

[Mattriz]

Fixed the problem.

Sound-Recording devices-properties-VoizReal Exp and selected "Noise Suppression".