I'm still worried about adverts

I can quite believe that this false positive was from an available download of a detection program. That's definitely a hard problem--how do you describe the malware for your software without triggering some other software's detector?

But I also know that Yahoo keep presenting me with adverts which are directed at the UK, and are possibly illegal on such grounds as being a fraudulent lottery.

I'm not a screaming opponent of adverts, but on the net they seem largely uncontrolled. I'm even seeing Green Card adverts again. They have the potential to be very dangerous, and the companies supplying them aren't doing much to encourage anyone to trust them.