High Pitched Noise

[Mike2641990]

Hi
 I have a Dell c610 lattitude laptop and when i put my sound on the most high pitched noise you will ever here comes on until you put it on mute again.
Anybody have any idea what this could be and how to fix the problem.
Any help is great Thanks
Mike

[GX1_Man]

1) Sound adapter on the motherboard has a problem

2) Updated sound drivers need to be loaded.

3) Other software problem.

What happened prior to this? How long has this been as issue? Any recent software added? Free of malware?