F-Secure caught lightning in a bottle, poured it into its scan engine, and then built a security suite around it. When we say this scanner’s fast, we mean buckle up, hold on to the seat of your pants, and hope you don’t get whiplash. F-Secure’s scanner sped through our test bed in just three minutes and 18 seconds the first time around, which is nearly twice as fast as the next-quickest AV suite and more nimble than the second, optimized scans of 60 percent of the other apps in this roundup. During a second scan, F-Secure zipped through our files in a mere 45 seconds.  

When you first install BullGuard, you’re prompted to select a notification level. One of the two choices clamps a muzzle on BullGuard, stifling alerts the program can figure out on its own. The other promises more notifications so you’ll always know what the mutt is up to. We say mutt because BullGuard is another security suite that builds on top of someone else’s scan engine. We saw this with ZoneAlarm, which chose to go with Kaspersky, while BullGuard fetched BitDefender’s scan engine, another solid choice.

It’s hard not to look a gift horse in the mouth when you’re told it’s a potential thoroughbred capable of racing in the Kentucky Derby, but later find out it’s limping on two legs short of a set and isn’t even fit for making glue. That’s what we think about ClamWin, a free, open-source antivirus program that comes saddled with “gotchas.”

Panda holds a ton of promise, and if it weren’t for a few niggling issues, we’d anoint it our favorite security suite. But there are some things that just can’t be ignored, like the same persistent pop-ups we complained about in the 2010 release. It started from the get-go with Panda reminding us that we still needed to activate the program (even though we hadn’t previously been prompted). Shortly after, another pop-up appeared imploring us to register, something that is usually optional. In this case, our choices were to go ahead and register or be reminded at a future date (one day, one week, or one month), with no option to disregard it forever. Bad Panda!