hax0r
Ok, there are some great links here, HOWEVER, explore at your own risk. I WiLL NOT be held responsible for your ignorance, or lack of Better Judgement.
You should download Kaspersky Internet Security, and then purchase a VALID License Key from your favorite auction site :X
That said, NEVER DOWNLOAD ANYTHING FROM ANYONE OR ANY PLACE THAT YOU DON'T TRUST,,,,,have fun.