Most consumers don't know it, but they don't have to buy popular software packages to protect their computers from viruses, spyware and other threats. They can security software for free. Grisoft offers free antivirus protection, as does AOL. Lavasoft's free Ad Aware protects against spyware. Zone Alarm has a no-cost version of its firewall software.
Does the free security software do the job? Robert Vamosi, a senior editor for technology review site CNET, says the free stuff is good, but the software you pay for is better.
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