jmw1 0 Newbie Poster

Hello, can anyone help me solve a problem I'm having with the sound quality on Skype/Yahoo instant messenger etc?
It was working fine until I installed a webcam for the first time last week. Now the sound quality is really bad with distracting noises in the foreground.
I tried uninstalling the webcam and also did a system restore in case I upset some settings during the installation but the bad sound quality remains. The sound is fine when watching things like youtube.

Any ideas would be very much appreciated.
Thanks.