Cyclic Audio Feedback

[Lasagnaluvr]

Out of the blue I'm getting a cyclic audio feedback through my computer (every 8 seconds). Doesn't matter if I unplug external speakers and run the sound through the monitor, it still occurs.
I have gone into audio settings in the control panel and 'beats' audio that came standard on my PC.
I have tried changing the output levels etc...no joy
Its ruining my Skype calls to my son at Uni...HELP!

 

[makkem]

Hi
Feedback is caused by the microphone being in close proximity to the speakers,try moving the mic about to see if you can find a position where this does not occur,or try turning the mic level down a bit.