Do you need antivirus on Windows 11, or is Microsoft Defender enough?
By the TrustiKeys support team. Updated , 3 min read
For many people, Microsoft Defender, built into Windows 11, provides solid malware protection, and it consistently scores well in independent lab tests. Paid suites are worth it when you want protection across several devices including Macs and phones, a VPN, a password manager, identity monitoring, or stronger phishing and web filtering.
What Windows 11 already includes
- Microsoft Defender Antivirus: real-time malware scanning, on by default.
- Controlled folder access: ransomware protection for your folders (off by default; turn it on in Windows Security).
- SmartScreen: warns about known malicious sites and downloads in Edge and Windows.
- Windows Firewall and, on supported hardware, device encryption.
Independent test labs such as AV-TEST and AV-Comparatives regularly rate Defender's malware detection highly, so the gap with paid products is smaller than it used to be.
What a paid suite adds
| Feature | Windows 11 built-in | Typical paid suite |
|---|---|---|
| Malware protection on this PC | Yes | Yes |
| Macs, iPhones and Android phones | No | Yes, usually 3 to 10 devices or unlimited |
| VPN | No | Included in many suites |
| Password manager | Basic (in Edge) | Cross-browser, cross-device |
| Identity / dark web monitoring | No | In premium tiers |
| Phishing protection in all browsers | Mostly Edge | Usually all major browsers |
Who should pay for antivirus?
- Families covering several PCs, Macs and phones from one account.
- Frequent travelers who want a VPN bundled with protection.
- Small businesses that want central management and support.
- Anyone who's been a fraud victim and wants identity monitoring.
If you have one Windows PC, keep it updated and are careful with email, Defender may be all you need. For help comparing suites, read how to choose antivirus software.
Options by need
- Lightweight protection for older PCs: Webroot SecureAnywhere AntiVirus.
- Security plus VPN, cleanup and anti-tracking for up to 10 devices: Avast Ultimate.
- Unlimited devices for one person with identity monitoring: McAfee+ Premium Individual.
Installing a paid antivirus turns Defender's real-time scanning off automatically. Uninstall any old antivirus first.
Frequently asked questions
Is Windows Defender good enough in 2026?
For basic malware protection on a single, up-to-date PC, it's a solid choice. Paid suites add extras rather than dramatically better detection.
Can I use Defender and another antivirus together?
Not for real-time protection. Windows disables Defender's real-time scanning when another antivirus is active, which is the intended behavior.
Do Macs need antivirus?
macOS has built-in protections, but Macs do get malware and phishing. A suite that covers Macs is useful in mixed households.
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