laptop picking up unwanted background audio
Everytime I use my laptop when the router is turned on,I constantly get background advertisements in audio only,they can be advertising anything from a product to SKY news or BBC news.I have to put my volume in mute all the time.This happens even when I have not got a Google web page open and even when I am playing a game,I have this happening.
What is causing it and what can I do to stop it?
This started a week or so ago.
It is driving me insane,please help!