Don't ask me how, but this appeared on mates laptop. We can't get any programme to run, windows email, itunes, IE (even in safemode) - all we get is a popup saying the pc is at risk and then asks us to purchase the programme! Have run malwarebytes and this hasn't helped. PC World want £50 to remove it and local IT engineer wants £40. If anyone has any knowlegde of removing this nasty without harming computer, I'd be really grateful. Thanks.