I keep getting adverts pop ups all over my internet.?

[Tom Barnett]

Whenever I go on the internet I get adverts pop up, sometime I click on something like a google link but a advert will pop up out of nowhere or load my page to something totally different to what I wanted I have used, google Chrome, comitbird, Firefox and Internet explorer but the same happens to all of them. It's a serious problem as I can get videos advert sometimes playing but there is no where for me to delete them. Meaning I have to mute my laptop. Any advice ?