Buying guide · 4 picks
Best antivirus for Windows
Windows is where the labs test most, so this is where the evidence is deepest. Every pick below scored 18 of 18 in AV-TEST's August 2026 Windows 11 round; what separates them is AV-Comparatives' harder tests and false-positive counts.
Ranked by the AVSO Editorial Desk
Prices and lab results verified How we scoreEditorial policy
Short answer:Bitdefender Total Security. The strongest Windows protection record of 2026 with the fewest false positives in September's Malware test.
View Bitdefender pricing (opens in a new tab)Best antivirus for Windows: our 4 picks, ranked
Top pick Best overall for Windows
Editorial score 9.0 out of 101. Bitdefender Total Security
Plan: Total Security
Why it’s here: The strongest Windows protection record of 2026 with the fewest false positives in September's Malware test.
The evidence
Price
$59.99 first year, 5 devices
Best Windows suite with extras
Editorial score 8.8 out of 102. Norton 360 Deluxe
Plan: 360 Deluxe
Why it’s here: Near-identical protection to Bitdefender, lighter on the PC, plus VPN and 50 GB of backup for Windows.
The evidence
Price
$49.99 first year, renews $124.99
View Norton 360 pricing (opens in a new tab)60-day money-back guarantee (annual plans)
Read review: NortonBest for fewest false alarms
Editorial score 8.6 out of 103. ESET HOME Security Essential
Plan: HOME Security Essential
Why it’s here: Two false positives in 400 Real-World cases, and a price that is not a first-year teaser.
The evidence
Price
$59.99 per year, 3 devices
Best free option for Windows
Editorial score 8.5 out of 104. Avast Premium Security (10 devices)
Plan: Free Antivirus / Premium Security
Why it’s here: The free edition is the one AV-TEST tested, and it scored 18 of 18.
The evidence
Price
Free; Premium $69.48 first year for 10 devices
Side by side
Lab results and prices for these picks. Product names open their reviews.
| Compare4 picks | BitdefenderTop pick | |||
|---|---|---|---|---|
| Editorial score | Editorial score 9.0 out of 10 | Editorial score 8.8 out of 10 | Editorial score 8.6 out of 10 | Editorial score 8.5 out of 10 |
| First year | $59.99first year | $49.99first yearLowest | $59.99first year | $69.48first year |
| Renewal / year | Not stated | $124.99 | Not stated | $99.99 |
| Real-World protection | 99.5%ADVANCED+Highest | 99.3%ADVANCED+ | 98.5%ADVANCED | 99.3%ADVANCED+ |
| False positives | 5 | 5 | 2 | 5 |
| Performance impact | 8.7 | 4.9 | 9.5 | 5.2 |
| VPN | 200 MB/day | |||
| iOS app | ||||
| Get it |
Windows already has Microsoft Defender
Every copy of Windows 10 and 11 includes Microsoft Defender Antivirus. It turns itself off when you install another antivirus and switches back on if that product expires or is removed. Paying for a third-party product buys you better lab results and extras, not protection from zero.
Stick with Defender if…
you keep Windows updated, use a password manager and avoid pirated software. Microsoft Defender was Approved in AV-Comparatives' 2025 summary. Our picks scored higher, which is why they are here.
Frequently asked questions
Is Microsoft Defender good enough for Windows 11?
For careful users it is a reasonable baseline: it is built in and was Approved in AV-Comparatives' 2025 summary. The products here achieved higher awards, such as Top-Rated, and add features like VPNs and password managers.
Which antivirus is lightest on Windows?
McAfee had the lowest impact score of all 20 products in AV-Comparatives' September 2026 performance test (3.1), followed among our eight by Norton (4.9) and Avast (5.2).
Top pick · Best antivirus for Windows
Our pick: Bitdefender
The most consistent lab record of 2026. Total Security: $59.99 first year · 30-day money-back guarantee.
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Sources
All accessed
- 1.AV-Comparatives Real-World Protection Test, February–May 2026. av-comparatives.org/tests/real-world-protection-test-february-may-2026/ (opens in a new tab)
- 2.AV-Comparatives Malware Protection Test, September 2026. av-comparatives.org/tests/malware-protection-test-september-2026/ (opens in a new tab)
- 3.AV-TEST Windows 11 home-user test, August 2026. av-test.org/en/antivirus/home-windows/windows-11/august-2026/ (opens in a new tab)
- 4.AV-Comparatives Performance Test, September 2026. av-comparatives.org/tests/performance-test-september-2026/ (opens in a new tab)
- 5.AV-Comparatives Advanced Threat Protection Test 2026 (Consumer). av-comparatives.org/tests/advanced-threat-protection-test-2026-consumer/ (opens in a new tab)