Paid antivirus is often sold with fear. In 2026 Windows’ built-in Microsoft Defender is enough for many basic users — if you keep the system updated and avoid suspicious installs.
How we chose
- We compared first-year price, renewal price and device count from providers’ own pages.
- Microsoft Defender is the free baseline — not a “loser” but the default.
- Promo prices (year 1) are separated from renewal; if the renew figure is missing, that is marked honestly.
- No invented scores or “test winner” claims without our own test.
When is Defender enough?
- You use Windows 10/11 with automatic updates on.
- You install apps mainly from the Microsoft Store / known sites.
- You use a browser with phishing protection (e.g. Edge SmartScreen).
- You back up important files (OneDrive or other).
When to consider paid antivirus?
- You want one subscription for several devices (Windows + Android + macOS).
- You need extra layers: banking browser, ransomware rollback, dark web monitoring.
- The household has users where central management helps.
Note: the first year is often discounted (e.g. Norton 360 Deluxe $49.99, renewal $124.99). Calculate the renewal price before you subscribe. F-Secure Total 5 devices was listed at €99.99/yr; ESET Ultimate 5 devices €119.03 for the first term.
Frequently asked questions
Is Microsoft Defender free?
Yes. According to Microsoft, Windows 11 includes Microsoft Defender Antivirus with no separate fee.
Does paid antivirus slow the PC?
Modern products are lighter than before, but an extra background process can still show on older machines. If the PC feels slow, try Defender + cleanup first before a new suite.
Can I run two antivirus products at once?
Usually not: real-time engines can conflict and weaken protection and performance. Pick one primary.