Typing Noises!

Hi - I have been trying to watch the 4th Season of Buffy but when I go through to the screen to watch it there is this annoying typing noise. I figure it is coming from an advertisement on the screen so I have searched around and closed everything, but still the typing noise is there and I can't get rid of it. Has anyone had the same problem and if so been able to get rid of it? Any help would be gratefully received!

Thanks
Suffolkgal