I've come across F-secure as one of the best ways to ward off Microgaming pop-ups. I like to download music and games to my PC and Mac at home. Some anti-virus software can't filter all the harmful files that appear on either the Mac or the PC. But you can do it with F-secure, especially when you like to download slots, blackjack, poker, and other casino games software. Nothing beats this virtual prophylactic. Me and my online buddies have been discussing this in the forums lately.