Microsoft Defender (Windows Security)
per month on a yearly plan, checked November 1, 2026
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Free baseline protection on Windows
Built into Windows 10 and 11 at no extra cost, with real-time scanning. Mac, iOS and Android coverage needs Microsoft 365 Personal or Family.
In the list: Best antivirus, and whether you need to pay at all
| Free tier | Built into Windows at no extra cost; no separate purchase |
|---|---|
| Platforms | Windows |
Close in price
| Product | Best for | Per month, yearly plan | Checked | Link |
|---|---|---|---|---|
| Norton AntiVirus Plus | One device, with cloud backup and a password manager | $2.50 | November 1, 2026 | Visit |
| Bitdefender Antivirus Plus | $29.99 first year for 3 devices | $2.50 | November 1, 2026 | Visit |
| Webroot Essentials | Cheap single-device antivirus | $2.92 | November 1, 2026 | Visit |
| AVG Internet Security | One-PC buyers with a free fallback | $3.33 | November 1, 2026 | Visit |