Best Antivirus for Windows 11 2026: Top Picks

Windows 11 continues to evolve its security architecture, and if you're on an ARM-based device (Surface and other ARM64 Windows laptops) or a recent feature update, compatibility is a real thing to verify before buying — some older antivirus builds have historically lagged on native ARM64 support. This guide covers the top options for Windows 11 based on their published compatibility and features, plus an honest look at whether Windows' own built-in protection is enough.

Which Antivirus Programs Support Windows 11 ARM64?

If you're on an ARM64 Windows device, check specifically for native ARM64 support, not just "compatible via emulation" — emulated (x86-on-ARM) antivirus engines can run slower and drain battery faster than a native build. Bitdefender and Norton have both shipped native ARM64 versions; check each vendor's current system requirements page for your specific device and Windows build, since compatibility details change with every major Windows feature update. If you're not on ARM hardware (the vast majority of Windows PCs), this isn't a concern at all.

Do You Still Need Third-Party Antivirus with Windows Defender?

This deserves an honest answer rather than a sales pitch: Microsoft Defender has become a genuinely competitive antivirus product. It scores well in independent lab tests (AV-TEST and AV-Comparatives both include it in their regular rounds), it's free, and it's built into Windows with no separate install.

Where a third-party suite still adds real value:

Ransomware rollback/remediation — restoring files after an attack — is a feature paid suites offer that Defender's free tier doesn't match.
Bundled extras — VPN, password manager, identity/dark-web monitoring — save money if you'd buy them separately anyway.
Parental controls — Defender's are basic compared to dedicated family suites.
Advanced firewall rules for outbound traffic control, useful for power users and small offices.

If you have good browsing habits, keep Windows updated, and don't need those extras, Defender alone is a defensible choice — check current AV-TEST/AV-Comparatives scores to confirm it's still performing well before deciding. If you handle sensitive data, run a small business, or want the bundled extras, a paid suite earns its subscription.

Top Antivirus Options for Windows 11

Exact pricing and tier features shift often — verify current numbers on each vendor's site.

A note on Kaspersky: the US Commerce Department banned the sale of Kaspersky software to US customers in 2024, and it no longer receives updates domestically. It's excluded from this guide for US readers regardless of its past reputation.

Which Antivirus Has the Lowest Performance Impact on Gaming?

The trustworthy source here is the independent labs' performance-test categories — AV-Comparatives runs a dedicated Performance Test, and AV-TEST scores system impact in every round. Among the majors, ESET and Bitdefender have the longest-standing reputations for a light footprint. What matters more than raw idle overhead is whether the suite's gaming mode auto-detects full-screen games and postpones scans/updates automatically — that's what actually prevents mid-match stutter, regardless of which vendor you pick. Confirm this behavior is automatic, not something you have to remember to toggle every session.

Frequently Asked Questions

Which antivirus programs are compatible with Windows 11 ARM64? Check current vendor system-requirements pages — Bitdefender and Norton have both offered native ARM64 builds, but confirm for your specific device and Windows version before buying. Do I still need a third-party antivirus if Windows Defender is already built-in? Not necessarily — Defender is competitive in independent lab tests. Pay for a third-party suite mainly for ransomware rollback, bundled extras, or advanced parental/firewall controls. Which antivirus has the lowest performance impact on Windows 11 gaming? ESET and Bitdefender have the strongest reputations for a light footprint — check current AV-Comparatives Performance Test scores for the latest word.

The Bottom Line

For most Windows 11 users, Bitdefender Total Security is a safe, well-rounded default — strong lab scores, light system impact, and native ARM64 support where relevant. Families wanting one all-in-one subscription should look at Norton 360 Deluxe. Performance-sensitive users on older hardware should consider ESET. And don't overlook the honest baseline: if your needs are simple, Microsoft Defender plus good habits may already be enough — verify against current independent lab scores before spending on a suite you don't need.