Since I have always used free anti-virus programs used but still frequently had problems with viruses, I'm 2009 to the buy-back program, Kaspersky Internet Security (3 Computer licenses) switched. To date, all the viruses were repelled attacks and my kids and I can surf calms the Internet. I can only recommend to anyone netizens Kaspersky. That's a small price to pay for a lot of power. I also buy a lot of my things from Amazon, because I get a fast and safe delivery in addition to a reasonable price and Amazon and Kaspersky can only recommend to anyone! With many greetings Klaus B.