Choose Your Defender! 10 Anti-Virus Programs Reviewed and Compared
Terminology 101
Malware in its many forms
MALWARE VS. VIRUS: The first thing you need to know is that malware is a generic term used to describe any malicious program. If it's unwanted and insidious, it's malware (or iTunes—zing!). Even though they're often confused, malware is not the same as a virus, though a virus is a common form of malware. Viruses are pieces of unwanted code that latch on to legitimate programs and can self-replicate. They're often unwittingly spread though email attachments, USB thumb drives, and file sharing.
WORMS: Like a virus, a worm self-replicates, but it doesn't need to attach itself to a host file. Worms burrow into your network looking for vulnerabilities to exploit and spread to other systems.
TROJAN: Like the horse of Greek mythology, a trojan masquerades as something awesome—a psychedelic screensaver or card game, for instance—but hides a terrible surprise. In other words, it appears to be something that it's not. Trojans can't replicate themselves like a virus, but once you run or install a trojan, it gets to work opening back doors or whatever evil deed the author intended it to do.
SPYWARE: Just what it sounds like, spyware is any unwanted program designed to spy on your activities. It might be a program that logs your keystrokes (keylogger) or tracking software that gather information about you without your knowledge or consent.
ADWARE: To keep it short and simple, adware bombards you with ads. Some examples include random pop-ups, unwanted banner ads, and browser redirects.
McAfee Internet Security 2012
Light on its feet, but too easily tripped up by malware
Two years ago we applauded McAfee for giving its security suite a much‑needed makeover. McAfee apparently decided to leave well enough alone, as the UI looks identical to both the 2011 and 2010 models. We’re not advocating change for the sake of change, but compared to the current crop of AV applications, McAfee’s menu layout has fallen behind the times and now feels stale.
McAfee did teach its old dog some new tricks, though nothing that will win it Best in Show. USB and removable drives are now scanned automatically (if you want them to be), it’s supposedly better at blocking botnet software from communicating with the mother ship, and a preinstall scan sniffs out malware before McAfee gets fully settled.

McAfee hasn't changed its appearance since 2010, but its real blemishes are beneath the surface.
Believe it or not, McAfee’s greatest strength is its low impact on performance. Our file transfer test took the same amount of time with or without McAfee installed. What’s more, McAfee added a mere five seconds to our boot time—impressive! We’re also blown away by McAfee’s speedy scan engine, which sifted through 35GB in less than 30 seconds on a second pass-through.
Cue the horror music because this is where things turn gruesome. While trotting around the web’s dark alleyways, McAfee tried its best to ward away hostile downloads, but was only semi-effective. File after cantankerous file filled up our desktop. As we clicked them, McAfee would often require a reboot to rinse off the scum. Repeated reboots quickly got old, and we still ended up with an infected test bed. After McAfee issued our system a clean bill of health, Malwarebytes detected more than 40 infections, including a MyDoom variant that sabotaged 25 percent of our CPU. That’s a problem.
McAfee made big strides in minimizing its impact on system resources, but it’s of little benefit if it can’t protect our system.
ESET Smart Security 5
Even the best boxers sometimes lose a round
ESET has flirted with a Kick Ass award each of the two previous times we reviewed it, and we had high hopes the third time would be the charm. But rather than receive a Kick Ass award, version 5 got its ass kicked by a fake AV virus and a few other pieces of malware. That’s unfortunate, because even though ESET has never offered the most features or fastest scan times, we could always count on it to overpower malware.

Don't overpay for security—ESET offers several subscription options, ranging from one to two years for up to five PCs.
Things weren’t quite as bad as they were with McAfee, and ESET did a much better job at blocking polluted downloads and keeping us away from murky websites. However, the few containments it did let through worked our system over like a schoolyard bully picking on the class nerd. We couldn’t access the Task Manager to kill the offending processes, nor were we able to load MSConfig to disable misbehaving apps from loading with Windows. The fake AV program even prevented us from installing third-party software, an underhanded tactic intended to stop users from calling in the cavalry. Our only option was to boot into Safe Mode, but you’d have to be pretty tech savvy to deal with the infections ESET couldn’t.
Performance was a mixed bag. ESET didn’t impress us with its PCMark 7 or PCMark Vantage scores, yet it added only five seconds to boot and three seconds to our file transfer test. Our test bed didn’t feel slow, but if you live and breathe benchmark scores, ESET will leave you winded.
The list of grievances concludes with ESET’s clunky interface. It’s not terribly difficult to find your way around, but it's just complicated enough to keep less experienced users from making changes. We had high hopes for ESET, but we are ultimately let down by this year’s release.