Do You Still Need Antivirus Software?
Many careful users can rely on the security built into Windows and macOS, kept fully up to date. A third-party antivirus suite is worth it if you want stronger web and phishing protection across devices, protection for family members who click less carefully, or extras such as a VPN and identity monitoring in one subscription.
Yes, for many people, but not always as a separate purchase. Windows includes Microsoft Defender and macOS has its own built-in protections, so you already have some antivirus. The real question is whether a third-party suite adds enough on top to be worth paying for.
The short answer: if you keep everything updated, use strong unique passwords and browse carefully, built-in protection is a reasonable baseline. If you share devices with family, want protection on phones and Macs from one place, or want a VPN and identity monitoring bundled in, a paid suite starts to earn its keep.
What your computer already has
Modern operating systems ship with far more security than they did a decade ago.
- Windows includes Microsoft Defender Antivirus, which provides real-time malware scanning, plus SmartScreen warnings for risky downloads and sites, a firewall, and ransomware-related controls you can switch on.
- macOS includes built-in malware checks, app signing and notarization requirements, and automatic security updates.
- iOS and Android sandbox apps, and their official app stores screen apps before they are listed.
These tools are maintained by the platform makers and update automatically. For a single careful user on a single computer, they cover a lot.
Where built-in protection falls short
Built-in tools are good at the basics, but they have gaps that a full suite is designed to fill.
Web and phishing protection across browsers. Some built-in web protection works best in the platform's own browser. Third-party suites typically add web protection that works across the browsers you actually use.
One dashboard for every device. If you want to manage protection on Windows PCs, Macs and phones for a household, a suite gives you one account and one place to check status.
Extras you would otherwise buy separately. Many paid plans include a VPN, a password manager, parental controls or identity monitoring. If you would pay for those anyway, a bundle can simplify things.
People who click quickly. Children, older relatives and busy people are more likely to fall for scam sites and fake downloads. Extra layers of web and scam protection help here more than anywhere.
Built-in vs paid suite at a glance
| What you need | Built-in protection | Paid antivirus suite |
|---|---|---|
| Real-time malware scanning on Windows | Yes (Microsoft Defender) | Yes |
| Web and phishing protection in every browser | Varies by browser | Usually included |
| Apps for Windows, Mac and phones under one account | No | Usually included |
| VPN | No | Included on some plans |
| Password manager | Basic, browser-based | Included on some plans |
| Identity or dark web monitoring | No | Included on some plans |
| Parental controls | Basic, platform-specific | Included on some plans |
| Cost | No extra cost | Subscription; renewal often higher than first term |
A quick way to decide
Ask yourself four questions.
- Do you keep your operating system and apps updated? If not, fix that first. Updates close the holes most malware uses, and no antivirus fully makes up for skipping them.
- Who uses the device? If it is only you and you are cautious, built-in tools may be enough. If children or less confident users share it, extra protection is more valuable.
- How many devices and platforms? A mix of Windows, Mac, Android and iPhone is easier to manage with one suite.
- Would you pay for a VPN or identity monitoring anyway? If yes, compare suites that include them. If no, a simpler plan or the free built-in tools may be better value.
If you answered "just me, updated, one computer, no extras," you can reasonably stick with built-in protection. Otherwise, a paid suite is worth comparing.
What a good antivirus suite should include
If you decide to buy, look for these essentials before you look at extras:
- Real-time malware and ransomware protection
- Web and phishing protection that works in your browsers
- Apps for every platform you use
- Clear first-term and renewal pricing, and an easy way to turn off auto-renewal
- Regular inclusion in independent lab tests
That last point matters. Labs such as AV-TEST and AV-Comparatives regularly test major antivirus products. We do not republish their scores because results change between rounds, but you should check a product's latest reports on the labs' own sites before you buy.
Which suites we rate
In our antivirus rankings, Bitdefender is our top pick overall for strong protection with a light footprint. Norton 360 is our pick if you want identity monitoring bundled in, and McAfee suits households that want scam-protection tools. If you mainly want a VPN, Surfshark One bundles a full VPN with antivirus.
Not sure between the top two? Our Norton vs Bitdefender comparison breaks down the differences.
What about Kaspersky?
Under a 2024 US Commerce Department decision, Kaspersky can no longer sell or update its antivirus software in the US. If you still have Kaspersky installed, it will not receive the updates that keep protection current, so switch to another product or rely on your built-in tools.
Habits matter more than software
Even the best suite cannot protect you from everything. These habits do more than any single product:
- Turn on automatic updates for your operating system, browser and apps.
- Use a password manager and unique passwords for every account.
- Turn on two-factor authentication for email, banking and shopping accounts.
- Back up important files to a separate drive or cloud service.
- Be suspicious of urgent messages asking you to click, pay or share a code.
Antivirus is one layer. Updates, strong passwords and backups are the others.
The bottom line
You do not need to buy antivirus to have some protection, because your device already includes it. You should consider a paid suite if you protect a household, use several platforms, or want extras such as a VPN and identity monitoring in one place. If you buy, check the renewal price and the latest independent lab results first.
Read more on free vs paid antivirus, or see how we rank antivirus products.
Frequently asked questions
Is Microsoft Defender enough on its own?
For many people who keep Windows updated and browse carefully, Microsoft Defender provides reasonable baseline malware protection. A third-party suite adds things like cross-browser web protection, apps for phones and Macs, and extras such as a VPN or identity monitoring.
Do iPhones need antivirus?
iOS limits what apps can do, so traditional virus scanning is not really possible on an iPhone. iPhone security apps focus on things like web and scam protection, a VPN and breach alerts. Keeping iOS updated matters most.
Can antivirus stop phishing?
Many suites block known phishing and scam websites and warn you about suspicious links, which helps. No product catches everything, so it is still important to check links and never share passwords or codes with someone who contacts you.
Does antivirus slow down my computer?
Any real-time scanner uses some resources. Most modern suites are designed to stay light during everyday use. Independent labs such as AV-TEST and AV-Comparatives measure performance impact; check their latest reports.