Is the free protection built into your device enough?
A few years ago, "just use what came with your computer" was weak security advice. That has changed. On every major platform, the built-in protection now scores close to the paid products in independent testing. For a lot of people it's genuinely enough. For some it isn't. Here's how to tell which group you're in.
The short answer by device
| Device | Built-in protection | How it tested | Enough for most people? |
|---|---|---|---|
| Windows 10 / 11 | Microsoft Defender Antivirus (Windows Security) | 6/6 protection, AV-TEST, Feb 2026 | Yes, with good habits |
| Mac | XProtect, Gatekeeper, notarization | Not scored as a standalone product by the major labs | Usually, if you install software carefully |
| Android | Google Play Protect | 17.5/18, AV-TEST, May 2026 | Yes, if you stick to the Play Store |
| iPhone / iPad | App sandboxing and App Store review | Traditional antivirus isn't possible on iOS | Yes. Keep iOS updated. |
Windows: Microsoft Defender
Windows 10 and 11 include Microsoft Defender Antivirus, switched on by default and updated through Windows Update. In AV-TEST's February 2026 evaluation it received the maximum 6 out of 6 for protection, tested against more than 12,000 malware samples. In AV-Comparatives' 2026 real-world testing it blocked 99.0% of attacks with zero false alarms, the cleanest false-alarm record in that comparison.
Its limits: it only protects Windows. Its protection against malicious websites works best in Microsoft's Edge browser. And it's purely antivirus, with no VPN, password manager or identity monitoring. Testers also note its detection is weaker when a computer is offline, because it relies partly on live cloud lookups.
Want to check it's working? See how to run a full scan with Windows Security.
Mac: XProtect and Gatekeeper
macOS includes several layers that work quietly in the background. XProtect scans for known malware and updates automatically. Gatekeeper blocks apps from unidentified developers. Notarization means Apple checks apps for malicious content before they can run normally.
The most common Mac problems today aren't classic viruses. They're adware, browser hijackers and fake "cleaner" apps, usually installed alongside something the user downloaded on purpose. That makes where you get software from far more important than which scanner you run. If you're already dealing with pop-ups, see how to stop pop-ups and browser hijackers.
Android: Google Play Protect
Play Protect checks apps in the Play Store and scans apps already on your phone. In AV-TEST's May 2026 Android test it scored 17.5 out of 18, detecting 99.6% of malware in real-time testing. Dedicated security apps from the major companies all scored a perfect 18, so they do catch a little more, but the gap is small.
The real risk on Android is installing apps from outside the Play Store ("sideloading"). Most Android infections start that way. If you don't do it, Play Protect covers the large majority of what you'll face.
iPhone and iPad
Apple doesn't let apps scan the rest of the system, because each app runs in its own sealed-off "sandbox". That's why no genuine antivirus exists for iPhone. Security apps for iOS offer extras like web filtering or VPNs, not virus scanning.
What actually protects you is keeping iOS up to date and installing apps only from the App Store. Be suspicious of any app or web page claiming it can "scan your iPhone for viruses". That claim itself is a warning sign.
When paying for more makes sense
- You want one subscription for several devices across platforms, for example Windows laptops, a Mac and Android phones in the same household.
- Someone in your home installs things freely, such as children, or relatives who are less confident online.
- You want specific extras in one place: ransomware file recovery, a VPN, a password manager or identity monitoring.
- You install software from many different sources, or regularly handle sensitive work files.
- You've already had an infection and want an extra layer of protection.
When it probably doesn't
If you keep your devices updated, install software only from official stores and well-known developers, and are careful with links and attachments, the built-in protection covers most real-world risk. The six habits in this guide will do more for you than any paid product.
If you do decide to pay, our 2026 comparison shows independent lab results alongside first-year and renewal prices.