Do You Actually Need Antivirus in 2025?

It’s one of the most common questions in consumer security: do you actually need to pay for antivirus software in 2025, or is the free stuff built into Windows good enough?

The honest answer is: it depends on who you are and how you use your computer. Here’s how to think about it.

What Windows Defender actually does now

Windows Defender — now officially called Microsoft Defender Antivirus — is not the joke it was a decade ago. It’s a fully featured security suite that includes:

• Real-time malware scanning
• Ransomware protection (controlled folder access)
• Phishing protection in Edge
• Firewall management
• Parental controls
• Device health reporting

In independent lab tests by AV-TEST and AV-Comparatives, Defender consistently scores in the top tier for malware detection — often matching or beating paid products. It updates automatically through Windows Update and runs silently in the background.

If you’re running Windows 10 or 11 and you’ve never touched your security settings, Defender is already active and doing a reasonable job.

So why does third-party antivirus still exist?

Because Defender, while good, has gaps — and because different people have different threat profiles.

What Defender doesn’t do well:

• VPN integration — many paid suites include a VPN for public Wi-Fi protection
• Password manager — some bundle these in (though standalone options are better)
• Identity monitoring — alerting you if your email appears in a data breach
• Cross-platform coverage — Defender is Windows only; if you use Mac, Android, and Windows, a paid product covers everything from one dashboard
• Ransomware recovery — some paid products offer cloud backup of key files specifically to recover from ransomware

The detection gap: Defender is excellent at catching known malware. Against very new, zero-day threats or sophisticated targeted attacks, paid products that update their threat intelligence faster can occasionally catch things Defender misses — though for most home users, this rarely matters in practice.

Who probably doesn’t need to pay for antivirus

You’re likely fine with just Defender if you:

• Run Windows 10 or 11 with updates enabled
• Don’t regularly download cracked software or pirated content
• Are reasonably careful about email attachments and links
• Don’t store anything on your PC that would be catastrophic to lose or expose

For this profile — which is most home users — Defender plus common sense is a solid baseline.

Who might benefit from a paid product

Consider paid antivirus if you:

• Have multiple devices across platforms — one subscription covering Windows, Mac, Android, and iOS is genuinely convenient
• Have children using the device — paid products have much better parental controls
• Regularly use public Wi-Fi — the bundled VPN in suites like Bitdefender Total Security becomes useful
• Run a small business from home — the stakes are higher; the extra monitoring is worth it
• Have had a malware infection before — suggests your browsing habits put you at higher risk

The one thing that matters more than any antivirus

Here’s what the security industry doesn’t make enough noise about: most successful attacks don’t get stopped by antivirus at all.

Phishing attacks trick you into entering your credentials on a fake site — antivirus can’t stop you typing your password somewhere you shouldn’t. Social engineering attacks manipulate you into running something. Credential stuffing attacks use passwords stolen from other breaches — your PC being clean doesn’t help.

The security measures that stop the most real-world attacks:

1. Unique passwords on every site — a password manager handles this
2. Two-factor authentication on email, banking, and social media
3. Keeping software updated — most malware exploits known, patched vulnerabilities
4. Scepticism about unexpected emails and links

A paid antivirus suite is a reasonable last line of defence. The measures above are more important layers that many people skip while worrying about antivirus.

The verdict

Windows Defender is genuinely good and free. For most home users, it’s enough — especially combined with good habits and a password manager.

If you want extra coverage, cross-platform protection, or useful extras like a VPN, a paid product is worth considering. Bitdefender is our top recommendation in that category — it adds meaningful protection without slowing your system down, and the pricing is reasonable.

The worst option is running nothing — which still happens more than you’d think.