This is definitely my first post and the sole reason I joined is to ask about the effectiveness of free antivirus software. My kaspersky is up for renewal and I definitely do not feel like paying $60 to renew it. I'm currently working on a laptop with Core 2 Duo (2.00) GHz, 4 GB ram, and 64-bit (Vista) processor. I have also just purchased an i7 920 (2.66 GHz), 9 GB Ram, and 64 bit (Vista) processor. I'm afraid of putting something too cheap on my new PC as well as my old laptop. I have been suggested to pick up clamwin, spybot, and windows defender. Help would be greatly appreciated. Thanks!