Having not had anything for over 2 years I'm now finding the adverts on sites like Break or Piratebay etc are full of malware. Had 2 attacks in about 2 weeks, 1st one was a Fake Windows Security Centre and then a fake Windows Recovery (made 'All' files hidden) so I've swapped from IE8/9 (which until then I had no problem with) for firefox so I can use Adblock+ and haven't had an issue since.