Is Windows Defender enough, or do I need paid antivirus?
For a careful user on one updated Windows PC, Microsoft Defender is enough: it scored a perfect 6/6 for protection in recent AV-TEST rounds. Paid antivirus becomes worth it when you have multiple devices and platforms, want a VPN, password manager, or identity monitoring included, or protect family members with riskier habits.
The free-versus-paid question has a different answer in 2026 than it had ten years ago. Microsoft Defender, built into Windows, now posts protection scores that match the paid leaders: AV-TEST gave it the full 6 out of 6 in its January-February 2026 home user round. For the core job, stopping malware on a single Windows machine, you no longer need to pay.
What paid suites actually sell today is everything around the engine. Defender covers only Windows, its phishing protection is strongest in Edge and weaker in Chrome or Firefox, and it includes no VPN, password manager, cloud backup, or identity monitoring. A household with Windows laptops, MacBooks, Android phones, and a couple of teenagers has gaps Defender was never designed to fill. That household is who Bitdefender and Norton are for.
The honest test: count your devices, list which extras you would genuinely use, and check whether you already pay for some of them separately (a standalone VPN, a password manager). If the list is short and your habits are careful, keep Defender and spend the money elsewhere. If the list is long, a suite is usually cheaper than the parts.