NOD32's protection and small footprint is unmatched by far IMO. Having used BitDefender, Kaspersky, Norton, McAfee, PC-Cillin, AVG, Avira and Avast!, I've found NOD32 to be far more superior to any of them at catching malware and viruses while not hogging resources. Updates are about 300-700 kilobytes each so even dial-up users can get them fast.