Best Antivirus for Windows 11

Quick picks

Best overall: Bitdefender Total Security — top-tier malware protection with a light footprint and useful extras.
Best all-in-one suite: Norton 360 — VPN, cloud backup, password manager, and identity features in one subscription.
Best free option: Microsoft Defender — built into Windows 11, nothing to install, and enough for careful users.
Best for cleanup plus protection: Malwarebytes Premium — excellent at adware and junk, and can run alongside Defender.
Best for power users: ESET HOME Security — lightweight, highly configurable, with strong banking protection.

How we chose

Malware and phishing protection, weighted toward long-running results from independent labs such as AV-TEST and AV-Comparatives.
Reputation for low system impact, so protection doesn't get in the way of everyday use on typical Windows 11 PCs.
What paid tiers genuinely add over Microsoft Defender: web protection across browsers, ransomware recovery, VPN, password manager, and identity features.
Pricing transparency, including how renewal compares with the first term and how easy auto-renew is to manage.
Ease of use: sensible defaults, clear alerts, and a reasonable number of upgrade prompts.
Vendor track record on security and how each company handles customer data.

1. Most people who want paid protection

Bitdefender Total Security

Bitdefender is a consistent top performer in independent lab tests from AV-TEST and AV-Comparatives, and it has a reputation for light system impact. Total Security covers Windows, macOS, Android, and iOS, and bundles multi-layer ransomware protection with file remediation, web and phishing filtering that works across major browsers, Safepay for banking, and a firewall. Autopilot keeps alerts quiet by making sensible decisions for you. The VPN on lower tiers has a limited daily allowance, and higher tiers add unlimited VPN, scam protection, and identity monitoring. Antivirus Plus is the cheaper entry tier with fewer extras.

Pros

Consistently strong results in independent malware protection tests
Light footprint for a full security suite
Ransomware remediation can restore files it sees being encrypted
Web protection works across Chrome, Edge, and Firefox

Cons

Included VPN is capped on lower tiers
Renews at a higher price than the first term, with auto-renew on by default
Regular prompts to upgrade to higher plans

Pricing: Annual subscription sold in tiers by device count and features, with a discounted first term that renews at a higher price unless you turn off auto-renew.

Visit Bitdefender

2. One subscription for antivirus, VPN, backup, and identity

Norton 360

Norton 360 is the most complete all-in-one suite here. Alongside malware and ransomware protection that regularly scores well in independent lab tests, plans include a Smart Firewall, Secure VPN, a password manager, PC cloud backup, and dark web monitoring, with parental controls and privacy monitoring on higher tiers. In the US, Norton 360 with LifeLock plans add identity theft protection and restoration support. The trade-off is cost and noise: renewal prices rise after the first year, and the app surfaces offers for other Norton services.

Pros

VPN included in Norton 360 plans rather than sold separately
Built-in cloud backup is a useful ransomware safety net
Identity theft protection available in the US through LifeLock plans
Strong, long-running record in independent lab tests

Cons

Renewal price is noticeably higher than the introductory price
More promotional prompts than most competitors
Clean removal sometimes needs Norton's dedicated remover tool

Pricing: Annual subscription in several tiers by device count and features; the first year is discounted and renews automatically at a higher price unless you turn auto-renew off.

Visit Norton

3. Careful users who want free, built-in protection

Microsoft Defender

Microsoft Defender Antivirus is built into Windows 11 and turns on automatically, with real-time and cloud-delivered protection, Tamper Protection, and definition updates through Windows Update. It has scored well in independent lab tests in recent years, and the Windows Security app adds SmartScreen, a firewall, and optional ransomware protection through Controlled folder access. For people who keep Windows updated, avoid pirated software, and are careful with links, it's genuinely enough. Its gaps are web protection outside Edge, no ransomware file recovery, and none of the extras paid suites bundle.

Pros

Free, preinstalled, and on by default
No subscription, renewals, or upgrade nags
Offline scan option for stubborn malware
Tightly integrated with Windows updates and security features

Cons

Phishing and site blocking is strongest in Microsoft Edge
Controlled folder access is off by default and can block legitimate apps
No VPN, password manager, or identity monitoring

Pricing: Free with Windows 10 and Windows 11; there is nothing extra to buy or renew.

Learn about Microsoft Defender

4. Adding strong cleanup and web protection to Defender

Malwarebytes Premium

Malwarebytes built its reputation on removing malware, adware, and potentially unwanted programs that other tools miss. Premium adds real-time protection, ransomware protection, exploit protection, and malicious website blocking. It's lighter on extras than the big suites, with no firewall of its own, cloud backup, or parental controls, and VPN and identity features cost extra through bundles. It can run alongside Microsoft Defender, which suits people who want an extra layer rather than a full replacement. The free version is worth keeping as an on-demand second-opinion scanner even if you choose another suite.

Pros

Excellent at finding adware and potentially unwanted programs
Simple, low-maintenance interface
Free version doubles as a second-opinion scanner

Cons

Fewer extras than full suites, with no firewall or cloud backup of its own
VPN and identity protection cost extra
Subscriptions auto-renew unless you turn it off in your account

Pricing: Free on-demand scanner; Premium is a paid subscription priced by device count, with optional bundles that add VPN or identity protection.

Visit Malwarebytes

5. Experienced users who want light, configurable protection

ESET HOME Security

ESET has a long record of strong results in independent lab tests, with a particular reputation for few false positives and a small system footprint. HOME Security plans add a firewall, a secured browser mode for banking and payments, anti-phishing, and a network inspector for your home Wi-Fi and devices, while higher tiers add extras such as a password manager, file encryption, VPN, and identity protection, depending on the plan and region. The advanced settings go deeper than most rivals, which suits power users but can overwhelm beginners. ESET NOD32 Antivirus remains available as a lean, antivirus-focused option.

Pros

Small system footprint and low false-positive reputation
Deep, granular settings for power users
Secured browser mode for banking and payments

Cons

Interface and settings can feel technical for beginners
The best extras are reserved for pricier tiers
Check the renewal price, which can differ from the first-term offer

Pricing: Annual subscription in several tiers by device count; introductory offers are common, so check what the plan renews at.

Visit ESET

Buying guide

Is Microsoft Defender enough on Windows 11?

For many people, yes. Microsoft Defender Antivirus is on by default, updates itself through Windows Update, and has scored well in independent lab tests in recent years. It's enough if you keep Windows and your apps updated, install software only from official sources, use a password manager, and keep backups. To get more from it, open Windows Security > App & browser control > Reputation-based protection settings and make sure Potentially unwanted app blocking is on, and consider Controlled folder access under Virus & threat protection > Ransomware protection. A paid suite makes more sense for less confident users, shared family PCs, or anyone who browses in Chrome or Firefox and wants stronger phishing and scam protection there.

What paid antivirus suites actually add

Every product here blocks malware in real time; the differences are in the layers around it. Web protection blocks phishing, scam, and malicious sites in any browser, not just Edge. Ransomware protection ranges from blocking suspicious encryption to Bitdefender's remediation, which restores files it saw being encrypted, and Norton's cloud backup. Many suites bundle a VPN, though lower tiers may cap daily data, and a password manager, which is useful if you don't already use one. Identity features such as dark web monitoring, credit alerts, and identity restoration help are mostly US-focused and reserved for top tiers. Only pay for extras you'll use; a standalone VPN or password manager can be better than a bundled one.

Renewal pricing and auto-renew

Antivirus pricing is built around a discounted first term. Most paid brands advertise a lower introductory price, then renew automatically at a higher standard rate. That isn't hidden, but it's easy to miss. Before you buy, check the renewal price shown at checkout or in the terms. After buying, sign in to your account, such as Bitdefender Central or your Norton account, see when the plan renews, and decide whether to leave auto-renew on. Turning it off doesn't stop protection during your paid term. Some benefits, like Norton's Virus Protection Promise, only apply while auto-renew is on, so weigh that first. A calendar reminder a few weeks before renewal gives you time to compare offers.

Run one antivirus, and switch cleanly

Two real-time antivirus products fighting over the same files can cause slowdowns, crashes, and missed detections, so pick one. Windows handles this for you with Microsoft Defender: when you install a third-party antivirus, Defender's real-time protection switches off, and it turns back on when you uninstall that product. On-demand scanners like the free version of Malwarebytes are the exception and are safe to keep alongside. If your laptop came with a preinstalled trial, uninstall it from Settings > Apps > Installed apps before installing something new, and use the vendor's official removal tool if leftovers remain. Afterward, open Windows Security and confirm which product is listed under Virus & threat protection.

FAQ

Do I need antivirus on Windows 11?

You need antivirus protection, but you may not need to buy it. Windows 11 includes Microsoft Defender Antivirus, which runs automatically unless another antivirus replaces it. For careful users who keep Windows updated, that's a solid baseline. Paid suites are worth considering if you want stronger web and scam protection across browsers, ransomware recovery, or bundled extras like a VPN and password manager.

Is free antivirus good enough?

Microsoft Defender is the free option we'd recommend for most people, because it's built in, has no ads, and has scored well in independent lab tests. Some third-party free antivirus apps are funded by upgrade prompts, bundled offers, or data practices worth reading about before you install them. If you want free extra coverage, add the free Malwarebytes scanner for occasional second-opinion scans.

Can I run Malwarebytes alongside Microsoft Defender?

Yes. The free version of Malwarebytes is an on-demand scanner, so it doesn't conflict with Defender. Malwarebytes Premium is also designed to be able to run alongside Microsoft Defender rather than replacing it. What you should avoid is running two full real-time antivirus suites, such as Bitdefender and Norton, at the same time.

Will antivirus slow down my Windows 11 PC?

All antivirus uses some resources, but the products on this list are generally light on modern PCs, and most people won't notice them during everyday use. Full scans can be noticeable on older hardware, so schedule them for times you're not working. If a PC slows down badly after installing antivirus, check that a second antivirus or an old trial isn't still running alongside it.

How do I turn off antivirus auto-renewal?

Sign in to your account on the vendor's website, not in the Windows app, and look for subscription or auto-renewal settings. For Bitdefender that's Bitdefender Central; for Norton it's your Norton account. Turning off auto-renew keeps protection until the paid term ends. If you can't find the setting, contact the vendor's support and ask them to disable automatic renewal.

Is Bitdefender or Norton better for Windows 11?

Both offer top-tier protection. Bitdefender is the better choice if you want light, quiet protection with strong ransomware recovery. Norton 360 is better if you want VPN, cloud backup, a password manager, and, in the US, identity theft protection in one subscription. See our Bitdefender vs Norton comparison for the full breakdown, including renewal considerations.

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