[bet074]

When doing a video call with MSN Messenger the party at the other end can see me fine on their webcam but the sound of my voice disappears and is replaced by interference. However I can still hear them talking to me.

This can happen at any time and with any contact I talk to so it's not a problem with the PC that the other party has. Often, upon initiating a video call everything is fine for a minute or two and then the interference begins and I have to stop and restart the call.

However it's impossible to really have a proper conversation as the interference at their end can appear any second and usually does.

I use a laptop with Windows Live Messenger and a good Logitech webcam and headset. The party still get the interference at their end if I use the headset or not.

Does anyone know what might be the problem here?

[poorman]

Check your windows sound mixer for the following.
For playback: Microphone is Muted
For Recording: Microphone is selected. NOT Wave Mix, What U Hear or any other source.

Also make sure your mic volume is not too loud, that it is picking up sound from your headphones.