Is Windows Defender Good Enough?

When you install Windows 10, you’ll have an antivirus program already running. Windows Defender comes built-in to Windows 10, and automatically scans programs you open, downloads new definitions from Windows Update, and provides an interface you can use for in-depth scans. Best of all, it doesn’t slow down your system, and mostly stays out of your way—which we can’t say about most other antivirus programs.

RELATED: Do I Really Need Antivirus If I Browse Carefully and Use Common Sense?

For a short while, Microsoft’s antivirus fell behind the others when it came to comparative antivirus software tests—way behind. It was bad enough that we recommended something else, but it’s since bounced back, and now provides very good protection.

So in short, yes: Windows Defender is good enough (as long as you couple it with a good anti-malware program, as we mentioned above—more on that in a minute).

But Is Windows Defender the Best Antivirus? What About Other Programs?

If you look at that antivirus comparison we linked to above, you’ll notice that Windows Defender, while good, does not get the highest ranks in terms of raw protection scores. So why not use something else?

First, let’s look at those scores. AV-TEST found that it still caught 99.9% of the “widespread and prevalent malware” in April 2017, along with 98.8% percent of the zero-day attacks. Avira, one of AV-TEST’s top rated antivirus programs, has the exact same scores for April—but slightly higher scores in past months, so its overall rating is (for some reason) much higher. But Windows Defender isn’t nearly as crippled as AV-TEST’s 4.5-out-of-6 rating would have you believe.

Furthermore, security is about more than raw protection scores. Other antivirus programs may occasionally do a bit better in monthly tests, but they also come with a lot of bloat, like browser extensions that actually make you less safe, registry cleaners that are terrible and unnecesary, loads of unsafe junkware, and even the ability to track your browsing habits so they can make money. Furthermore, the way they hook themselves into your browser and operating system often causes more problems than it solves. Something that protects you against viruses but opens you up to other vectors of attack is not good security.