Best Free Antivirus Software
Free antivirus in 2026 is in a strange place. The honest answer for most Windows 11 users is "the thing already running on your PC" — Microsoft Defender scored 18/18 at AV-TEST February 2026, the same score the paid flagships from Bitdefender and Norton posted. That was not true five years ago. Today it is. If you are weighing free against paid, our antivirus for Windows 11 guide shows where paying actually buys you more.
But "Defender is enough" is not the whole story. Some users need a second on-demand scanner. Some need a free tool for an old Windows 7 or XP machine that Defender abandoned years ago. Some are shopping for a Mac or a Chromebook where Defender does not exist. And some simply do not trust Microsoft and want a non-Microsoft alternative that does not nag them to upgrade every time they open a browser.
We ranked nine free antivirus products that are actually free — no 30-day trial, no "free scan, paid removal" dark pattern, no mandatory credit card. Rankings reflect current lab data, hands-on behaviour on a Windows 11 reference machine, and community sentiment from r/antivirus, r/techsupport, and r/cybersecurity threads posted in the last six months.
What "free" actually means in 2026: real-time protection included (not just on-demand scanning), no paywall on signature updates, and no feature-gate pop-ups more than once a month. Products that violate any of those are either excluded from this list or called out explicitly in their section.
Which Free Antivirus Is Best Right Now?
Short answer: Microsoft Defender, if you are on Windows 10 or 11 and you do not want to think about it.
Defender is built into Windows, it scored 18/18 at AV-TEST February 2026 (Protection 6/6, Performance 6/6, Usability 6/6), it does not show pop-up ads, and it does not run a separate installer or tray icon you have to babysit. For most home users the decision is over.
The interesting cases are the exceptions. If you want a second opinion scanner alongside Defender, Malwarebytes Free is the consensus pick on r/techsupport. For the full list of safe Defender pairings — and the conflicts to avoid — see the dedicated guide. If you are on Windows 7 or Windows 8.1 where Defender is not updated, Avast Free or AVG Free are still supported. On Windows 10, pair any free antivirus with ESU enrollment — free AV cannot patch the operating system after end of support. If you want a non-Gen-Digital and non-Microsoft option, Bitdefender Antivirus Free Edition gives you the Bitdefender engine without a dime. If you want to cover a Mac free of charge, Avast Free and AVG Free both run on Windows and macOS.
Avoid shopping for free antivirus by ad — a large fraction of "top free antivirus" ads in Google search results in 2026 lead to products that are not free after day 30, including TotalAV, Scanguard, PC Protect, and similar pay-to-remove tools. None of those are on this list.
The Top 8 Free Antivirus Picks
- Microsoft Defender — built-in to Windows 10/11, 18/18 AV-TEST Feb 2026, no pop-ups, no upsells. The one most people should use.
- Bitdefender Antivirus Free Edition — Windows-only, very lightweight, the Bitdefender engine without the UI noise. Quiet third-party pick.
- Avast Free Antivirus — 18/18 AV-TEST, 5.5 impact in AV-Comparatives’ April 2026 Performance Test, supports Windows 7 SP1 where Defender does not. Caveat: Jumpshot history (FTC-settled 2024).
- AVG Antivirus Free — same engine as Avast since 2016, slightly cleaner UI, same corporate owner (Gen Digital).
- Avira Free Security — 17.5/18 AV-TEST Feb 2026, generous free tier across Windows / macOS / iOS / Android, includes Software Updater. Gen Digital alternative with a quieter UX than Avast.
- Malwarebytes Free — on-demand cleanup only at the free tier (no real-time). Best as a second-opinion scanner layered next to Defender.
- Panda Dome Free — 18/18 AV-TEST December 2025, unlimited Windows devices on one account, cloud-detection-first means a lightweight local agent. WatchGuard-owned (US) since 2020.
- Comodo Free Antivirus — containment-based protection that sandboxes unknown files in a virtual environment. Advanced default-deny posture; not for non-technical users.
Honorable mention: ClamWin — open-source, on-demand only, slow signature updates. Useful only for IT technicians building rescue USB sticks or for sysadmins scanning file shares from a clean machine. Not a daily-driver AV in 2026.
Latest cycle update (April 2026): in AV-TEST’s April 2026 Windows test, Microsoft Defender, Bitdefender, Avast, AVG, Avira and Kaspersky all kept a perfect 6/6 for protection — the free engines below remain near the top of the current cycle.
Detailed Review of Each Free Pick
#1 Microsoft Defender
Platforms: Windows 10 and Windows 11 (built in). Not available standalone for Windows 7, macOS, or Linux.
Lab results: AV-TEST February 2026 — 18/18 (Protection 6/6, Performance 6/6, Usability 6/6). AV-Comparatives Real-World Protection 2025 — Advanced+ (99.7% block rate).
What it gets right: Already running, already configured sensibly, zero pop-ups, zero upsells, zero ads for "premium" upgrades. Cloud-assisted detection via Microsoft's telemetry catches zero-days quickly. Exploit Guard, Controlled Folder Access (ransomware protection for specific folders), and SmartScreen URL filtering are all free.
What it misses: No VPN, no password manager, no parental controls. No cross-platform coverage for your Mac or phone. The management UI is split between Settings > Privacy & security and the Windows Security app, which can be confusing.
Community take (r/antivirus): the dominant sentiment is "Defender is enough for most people now", a flip from the 2018–2020 era when Defender was routinely disparaged. Multiple highly-upvoted posts cite Microsoft's cloud-backed detection and telemetry scale as reasons Defender closed the gap with paid vendors.
Hands-on footprint: On our Windows 11 reference machine (i5-12450H, 16 GB), Defender idle RAM sat around 120–160 MB across MsMpEng.exe and SecurityHealthService.exe. A full scan of 280 GB finished in roughly 35–40 minutes with CPU peaking at 25–35%. Slower than Bitdefender's paid scanner, faster than Norton's, unnoticeable during normal desktop work.
#2 Bitdefender Antivirus Free Edition
Platforms: Windows only.
Lab results: Bitdefender's paid flagship scored 18/18 at AV-TEST Feb 2026; the free edition shares the same core engine, though behavioural protection modules are pared back — treat the paid lab score as engine evidence, not proof of the free tier’s full feature set (the free edition omits the web, ransomware and privacy modules paid Bitdefender includes).
What it gets right: Minimal UI, almost no pop-ups, low RAM footprint (about 140 MB on our reference machine). The free edition has been around since 2011 and Bitdefender has consistently kept it functional rather than crippled. Uses the same cloud detection backbone as the paid product.
What it misses: No web filter, no anti-phishing browser extension, no ransomware-specific protection, no VPN. The free tier is fundamentally "a file scanner that catches things"; the advanced layers are behind the paywall.
Community take: Bitdefender Free is a cult favourite on r/cybersecurity for users building lightweight Windows configurations — it stays quiet in the tray and does not ping you with upgrade offers. Less visible on r/antivirus simply because fewer home users know it exists.
#3 Avast Free Antivirus
Platforms: Windows 7 SP1 and up, macOS, Android, iOS (limited).
Lab results: AV-TEST February 2026 — 18/18. AV-Comparatives 2025 — 5.5 impact in the April 2026 Performance Test (lightest free paid-vendor engine; Defender is the test baseline, not scored), Advanced+ Real-World Protection.
What it gets right: The free tier is genuinely full-featured by 2026 standards: real-time scanning, web shield, email shield, Wi-Fi inspector for home-network audit, and behaviour blocker. Performance on older hardware is notably good — Avast was the among the lightest in AV-Comparatives’ April 2026 Performance Test (5.5 impact).
The Jumpshot caveat. Between 2014 and early 2020 Avast's subsidiary Jumpshot sold anonymised-but-re-identifiable browsing data from free-tier users to third-party clients. The programme shut in January 2020 after joint PCMag and Motherboard reporting, and the FTC order imposing a $16.5 million fine and a ten-year ban on selling browsing data was finalised in February 2024. Avast's current privacy policy explicitly excludes the old data-broker practices. Whether that restores your trust is a judgement call: it is mentioned in nearly every r/privacy thread about Avast and AVG to this day.
Upsell frequency: Free-tier Avast pops up "premium" upgrade prompts more often than Defender — several a month is typical, and some appear as browser-style notifications. Can be tuned down in Settings but not silenced completely.
Corporate note: Gen Digital owns Avast, AVG, Avira, Norton, and LifeLock as of 2022. Switching from Norton to Avast specifically "to get away from Norton" does not change the parent company.
#4 AVG Antivirus Free
Platforms: Windows 7 SP1 and up, macOS, Android.
Lab results: AV-TEST February 2026 — 17.5/18 (Protection 6/6, Performance 6/6, Usability 5.5/6).
AVG and Avast have shared the same detection engine since Avast acquired AVG in 2016; under the hood the two products are near-identical. The differences are cosmetic: AVG's interface is a bit more restrained, and upsell prompts arrive slightly less often. The Jumpshot caveat applies equally to AVG, since Jumpshot collected data from both products.
Who picks AVG over Avast: users who want the Avast engine but find Avast's UI too aggressive with notifications. Otherwise the two are interchangeable.
#5 Avira Free Security
Platforms: Windows 10/11, macOS 12+, iOS, Android (free tier on all four).
Lab results: AV-TEST February 2026 — 17.5/18 (Protection 6/6, Performance 5.5/6, Usability 6/6). AV-Comparatives 2025 — Advanced certification.
What it gets right: One of the only free third-party engines with serious Mac support — Avira Free for Mac scored 96.8% on the AV-Comparatives Mac Security Test June 2025, the highest free-tier Mac score in that test. Bundles a basic VPN (500 MB/day on free tier), Software Updater (auto-patches third-party apps for outdated CVEs), a limited Password Manager, and Privacy Pager. The free tier is genuinely useful, not a 30-day trial.
What it gets wrong: Free tier shows upgrade prompts to Avira Prime. Performance dent is slightly heavier than Defender on the same hardware. The data-collection history is cleaner than Avast/AVG, but Avira Limited was acquired by NortonLifeLock in 2021 (now Gen Digital) — same parent company that owns Avast, AVG, and Norton.
Who picks Avira Free: Mac users who want a free third-party scanner with macOS-tuned detection, Windows users who specifically want the Software Updater feature, and households that already pay for Avira Prime on one device and want free coverage on auxiliary devices. Full Avira review.
#6 Malwarebytes Free
Platforms: Windows, macOS, Android, iOS, ChromeOS.
Critical clarification: Malwarebytes Free in 2026 is on-demand only — real-time protection is behind the Premium paywall (~$44.99/year). After the 14-day free Premium trial expires, the tool drops to a scan-and-clean utility.
What it gets right as a second layer: Malwarebytes' strength has always been cleanup. Its anti-PUP (potentially unwanted program) heuristics catch adware and browser-hijack toolbars that Defender often lets slide. Used as a monthly "second scan" next to Defender, Malwarebytes Free is excellent value (i.e., free).
What it is not: a primary antivirus. Leaving a system protected by Malwarebytes Free alone means no real-time scanning. This is a common misconfiguration flagged in r/techsupport help threads: "I had Malwarebytes Free running and still got hit" — because the free tier does not guard the system live.
Community consensus (r/antivirus, r/techsupport): the canonical advice is "Defender + Malwarebytes Free on-demand". It is the most-repeated free-AV recommendation in the subreddit's last twelve months.
#7 Panda Dome Free
Platforms: Windows 10/11 only (free tier Windows-only; macOS and Android require paid Panda Dome Essential).
Lab results: AV-TEST December 2025 — 18/18 (Protection 6/6, Performance 6/6, Usability 6/6). AV-Comparatives 2025 — Advanced+ certification, Real-World Protection 99.4%.
What it gets right: Cloud-detection-first architecture means the local agent is genuinely lightweight — among the lowest CPU and RAM overhead we measured in free-tier products, consistent with r/antivirus community reports. Free tier covers unlimited Windows devices on a single account, a generous policy among free AVs (most cap at 1–3 devices). Process Monitor and Network Analyzer visible from the dashboard are unusual for the free tier.
What it gets wrong: Cloud detection model means weaker offline protection — if the Panda agent loses internet, signature-based fallback is significantly behind local-engine competitors. Free tier displays upgrade prompts and offers a Panda toolbar in browser by default (uncheck during install). WatchGuard acquired Panda in 2020 — US-based parent, reassuring for US users, but the 2021 telemetry-sharing language triggered EU privacy reviews.
Who picks Panda Dome Free: Windows-only households with 5+ devices on a single network where per-device licensing would be expensive, users who specifically value lightweight cloud-detection over local-engine performance (older hardware, low-RAM machines), and users who want unlimited device coverage without paying. Not the right pick for laptops that travel and frequently work offline. Full Panda review.
#8 Comodo Free Antivirus
Platforms: Windows only.
What it gets right: Comodo’s differentiator is containment — unknown files are automatically sandboxed and run in an isolated virtual environment rather than being trusted or blocked outright. The default-deny posture is genuinely effective against novel malware and zero-day samples, an approach the enterprise security industry has largely converged on (Bromium, HP Sure Click, Microsoft Application Guard all use variations of the same idea). Free tier covers unlimited Windows devices.
What it gets wrong: The installer historically bundled the Comodo Dragon browser, a Yahoo search hijack, and a DNS change without clear opt-out — flagged repeatedly on r/techsupport over the past five years. The 2025 installer cleaned some of that up but still defaults to enabling browser extensions you did not ask for. Detection in standard lab tests has not been benchmarked recently because Comodo has opted out of AV-TEST Home consumer testing since 2023, citing methodology disputes; the absence of independent third-party scores is a real evaluation gap.
Who picks Comodo: advanced Windows users who want aggressive default-deny posture, understand sandbox prompts, and are comfortable whitelisting legitimate software by hand when it gets contained on first run. Not recommended for non-technical relatives — the containment prompts will confuse them, and the install-screen defaults require careful attention. If you are reading this section and unsure whether you fit the user profile, you do not. Pick one of the eight products above instead.
Honorable mention — ClamWin: Open-source Windows front-end for the ClamAV engine. On-demand only. No real-time protection. Useful for IT technicians building rescue USB sticks and sysadmins scanning file shares from a clean machine. Signature updates ship slower than commercial vendors and detection on fresh zero-day samples lags significantly. The modern Microsoft replacement for the classic ClamWin-on-rescue-CD workflow is Microsoft Safety Scanner (free, on-demand, supported by Microsoft). Not a daily-driver AV in 2026 — a toolkit entry, not a Top 8 pick.
Dropped from this ranking: Sophos Home. Sophos discontinued its permanent free tier at the end of 2021; Sophos Home is now a 30-day Premium trial, not a forever-free product, so it no longer qualifies for this free-only list. For cross-platform free coverage, Avast Free or AVG Free both run on Windows and macOS.
Why Did Microsoft Defender Win the Free Antivirus Game?
If you are reading this article in 2026 and you already run Windows 10 or Windows 11, the answer to "what free antivirus should I install?" is usually "the one you are already running". That was not a defensible claim in 2019. It is now.
Test scores caught up. Defender has posted 18/18 at AV-TEST in every cycle since mid-2023, matching Bitdefender, Norton, Kaspersky, and McAfee on detection, performance, and usability. In the February 2026 AV-TEST Home User Windows 11 test, Defender was among the nine products that earned full marks. The "Defender is weak" narrative is a decade-old meme kept alive by tech blogs that have not retested.
Integration is unbeatable. Defender ships as part of Windows. There is no installer to run, no account to create, no separate tray icon, no update service to monitor, no license to renew. When Microsoft ships a detection update through Windows Update, every machine on the planet with automatic updates on receives it in hours.
Cloud detection is at hyperscaler scale. Defender telemetry covers over a billion Windows endpoints. When a novel malware sample is seen on any of them and flagged by heuristics, the cloud-side classification propagates to every other endpoint almost immediately. No consumer-AV vendor can match that telemetry volume — not Norton, not Bitdefender, not Kaspersky.
No upsell noise. This is the quietly enormous differentiator. Defender never pops up a "renew now" banner, never asks you to upgrade to "Premium Security", never sells you a VPN you did not ask for, never shows a desktop notification about "critical threats detected" that resolve into an ad for a paid tier. Free Avast, AVG, and Bitdefender Free all do this to varying degrees.
What Defender still does not do: cover your Mac, cover your phone, provide a bundled VPN, or give you parental controls worth calling parental controls. If your threat model needs any of those, you are shopping in the paid tier now, not the free tier.
If You're a Mac User on a Budget
Mac users already have XProtect, Gatekeeper and notarization as a built-in baseline. A free Mac antivirus adds second-opinion scanning or web protection, but free Mac tools rarely match paid suites like Intego or Bitdefender for Mac — see our best antivirus for Mac guide for the full picture. On a budget, pick the one option that matches your situation, not all of them:
- Best free Mac engine: Avast Free Antivirus for Mac. The strongest free third-party detection engine on macOS, on top of Apple’s built-in XProtect and Gatekeeper. Same Jumpshot caveat as Windows Avast applies.
- Best cross-platform free coverage: Avast Free or AVG Free. Both run on Windows and macOS at no cost. Best fit for mixed-OS households where one person manages security for the whole family.
- Best quiet utility alternative: Avira Free Security for Mac. Scored 96.8% on the AV-Comparatives Mac Security Test June 2025, the highest free-tier Mac score in that cycle. The Software Updater module (auto-patches third-party apps for outdated CVEs) is unusual for a free Mac AV and genuinely useful.
- Best paid Mac upgrade: Intego Mac Internet Security X9 at $39.99 first year. Built exclusively for macOS since 1997, scored 97.1% on the AV-Comparatives Mac Security Test June 2025, identified Cuckoo Stealer in April 2024 ahead of most cross-platform engines. Not free, but the cheapest Mac-specialist option for households where the Mac is the primary machine.
Free Antivirus vs Free Trial vs Free Scanner
A real free antivirus gives ongoing protection with no payment deadline. A free trial gives paid features for 14–30 days, then expires or downgrades. A free scanner detects or removes malware on demand but does not protect the machine in real time.
For daily protection you need a real-time antivirus: Microsoft Defender, Bitdefender Free, Avast Free, AVG Free or another permanent free tier. For cleanup, on-demand tools like Malwarebytes Free or Microsoft Safety Scanner are useful, but they are not primary protection — Microsoft Safety Scanner is explicitly an on-demand removal tool, not a real-time antivirus. (This is also why a product sold as a “30-day free trial,” like Sophos Home, is not a free antivirus.) See our free vs paid antivirus guide for where paying actually helps.
Best Free Setup for Most Windows Users
For most Windows 10/11 users, the best free setup is Microsoft Defender as the real-time antivirus plus Malwarebytes Free as an occasional second-opinion scanner. Defender handles real-time protection, SmartScreen, cloud-delivered protection and ransomware folder options. Malwarebytes Free is useful after a suspicious download or when adware shows up, but it should not replace Defender because the free tier is on-demand only.
Do not install Avast Free, AVG Free, Bitdefender Free and Defender all as real-time scanners at once. Two real-time engines can conflict over file-access hooks and slow the system — see can I run two antivirus programs?. One real-time antivirus plus one on-demand scanner is the cleaner free stack.
Defender Settings to Check Before Installing Anything Else
Before installing another free antivirus on Windows 10/11, check Windows Security first: real-time protection, cloud-delivered protection, automatic sample submission, SmartScreen, firewall status, and ransomware protection / Controlled Folder Access.
Many people think they need a new antivirus when Defender is simply switched off, Windows is out of date, SmartScreen is disabled, or Controlled Folder Access was never turned on. Fix the built-in stack first — see is Windows Defender good? — then decide whether you still need Bitdefender Free, Avast Free or another third-party tool.
What Free Antivirus Usually Does Not Include
Free antivirus usually covers malware scanning and basic real-time protection. It usually does not include a full VPN, identity-theft monitoring, parental controls, dark-web monitoring, a family dashboard, an advanced firewall, scam-call protection, a password manager, cloud backup or premium support.
That does not make free antivirus bad. It just means the free tier solves the malware layer, not the whole digital-safety stack. If you need a VPN, parental controls, identity monitoring, a multi-device dashboard or phone-scam protection, you are moving into paid-suite territory.
Free Antivirus and Scam Protection
Free antivirus can block many known malicious sites and downloads, but it usually does not give the strongest scam protection. Scam texts, fake calls, QR-code scams, fake delivery messages, romance scams and deepfake social-media scams often need dedicated scam-detection features, browser protection, mobile permissions or paid suites.
For Windows users, Defender plus SmartScreen gives a baseline for malicious sites and downloads. For broader scam protection across texts, calls, QR codes and deepfakes, see our best antivirus for scam protection guide — free antivirus alone does not solve the whole scam problem.
Free Antivirus for Windows 7 / 8.1 Holdouts
If a PC is still on Windows 7 or 8.1, the real recommendation is to upgrade the operating system, not just install another antivirus. Free Avast or AVG may still support older Windows versions, but browser support, TLS, drivers and OS security updates remain the weak point.
Use old-Windows free antivirus only as damage reduction. Do not use an unsupported OS for banking, crypto, business email, password management or other sensitive accounts.
The Hidden Costs of "Free"
No consumer software is actually free. The question is what you pay with instead of money. Here is what each free-antivirus vendor costs you in non-cash terms.
Pop-ups and upgrade prompts. Avast and AVG are the worst offenders; Bitdefender Free and Avira Free are relatively quiet; Defender is silent. Over a year, a user who dismisses three upgrade prompts a week from Avast has been interrupted 156 times by something they did not ask for. That is a real UX cost.
Data-collection history. Avast and AVG carry the Jumpshot legacy (2014–2020, FTC-settled 2024). Kaspersky carries the US-government-determination history (2024 ban). Both are facts, not allegations. Neither vendor is currently accused of the same practices, but both cases are in living memory and both are routinely cited in r/privacy discussions.
Feature gating that becomes nagware. Some free-AV installers default to enabling browser toolbars and search-engine changes that you did not request — uncheck them during setup. Free Malwarebytes expires from Premium to on-demand after 14 days without warning users clearly — a common r/techsupport complaint from people who believed they were still protected in real-time.
Platform lock-in. Defender exists only on Windows. Free Avast/AVG cover Windows, macOS, and Android but with significantly less feature parity outside Windows. Avast Free and AVG Free are the most cross-platform free options here, covering Windows and macOS.
No VPN, no password manager, no cloud backup. Every free antivirus on this list gives you antivirus. None gives you a bundled VPN, a real password manager, or cloud backup in the free tier. If your security shopping list includes those, you are looking at a paid suite like Bitdefender Total Security, Norton 360, or a separate £5/month VPN plus Bitwarden Free.
Vendor-by-vendor data-collection summary (May 2026):
| Vendor | Parent | Data-collection history | Telemetry opt-out |
|---|---|---|---|
| Microsoft Defender | Microsoft | None on consumer side. Cloud-delivered protection feeds Microsoft’s commercial threat-intel pipeline; no third-party data sales. | Yes — Settings → Privacy & Security → Diagnostic data |
| Bitdefender Free Edition | Bitdefender (Romania, private) | Clean — no data-broker history. Romania-based ownership outside the US / UK / EU big-tech consolidation. | Yes |
| Avast Free | Gen Digital | Jumpshot programme (2014–2020) sold anonymized browsing data; shut down Jan 2020 after disclosure. FTC settled Feb 2024 for $16.5M plus 10-year data-broker ban for Avast Limited and AVG Limited. | Yes — Settings → Privacy |
| AVG Free | Gen Digital | Same Jumpshot history and FTC consent order. Engine merged with Avast in 2016. | Yes — Settings → Privacy |
| Avira Free Security | Gen Digital (acquired 2021) | Cleaner than Avast/AVG; pre-acquisition Avira had no Jumpshot involvement. Post-acquisition data-handling now governed by Gen Digital privacy policy. | Yes |
| Malwarebytes Free | Malwarebytes Corporation (US, private) | Clean — no data-broker history. On-demand only on free tier. | Yes |
| Panda Dome Free | WatchGuard (US; acquired 2020) | Cloud-detection model requires telemetry. 2021 privacy-policy update triggered EU reviews; settled without finding. No consumer data-broker history. | Limited (cloud detection requires baseline telemetry) |
| Comodo Free | Comodo Security Solutions (US, private) | No consumer data-broker history. Historical installer-bundling complaints (Comodo Dragon browser, Yahoo search hijack, DNS change) flagged on r/techsupport 2018–2024; 2025 installer cleaned some but defaults still need careful attention. | Yes |
Bottom line: Microsoft Defender, Bitdefender Free, Malwarebytes Free, and Comodo Free are the four products on this list with no consumer-side data-broker history and minimal-to-zero telemetry concerns. Avast and AVG are post-FTC-settlement (10-year data-broker ban active through 2034) but the historical record still shapes community trust. Avira is the cleaner Gen Digital alternative if you want a Jumpshot-era-cleaner free engine without leaving the family entirely. Pick accordingly.
When to Stop Using Free and Pay for Antivirus
Free is the right call most of the time. Here is when it is not.
You want a bundled VPN you will actually use. If you stream region-locked content, travel with a laptop on hotel Wi-Fi, or work from coffee shops regularly, a dedicated VPN is worth the £5/month or €5/month. Bundled into Norton 360 Deluxe or Bitdefender Premium Security, it becomes the cheapest VPN you will find.
You have children and want enforceable parental controls. Free antivirus tooling on this list does not offer parental controls that work. Norton 360 Deluxe, Bitdefender Total Security, and Kaspersky Plus all do, and they do it better than the router-level controls most ISPs offer.
You manage more than three devices. Most free tiers cap at one to three devices. If your household has four phones and three laptops, the per-device maths tips in favour of a paid multi-device suite like Norton 360 Deluxe (5 devices) or Bitdefender Family Pack (15 devices).
You are a high-value identity-theft target (US). If you have a professional profile that makes you a plausible target — business owner, physician, attorney, journalist — Norton 360 with LifeLock or Aura are worth the spend specifically for the identity-restoration specialists, not the antivirus engine.
You want one dashboard for the whole household. Paid Bitdefender, Norton, and Trend Micro offer family dashboards where you can see every family member's device status from one screen. Free tools do not.
Everyone else: Defender plus Malwarebytes Free on-demand remains the honest recommendation, and the community consensus on r/antivirus and r/techsupport matches that.
Best Free Antivirus by User Type
Pick by your situation, not by feature lists. Each row below is a single, decision-made answer for a specific user profile.
- Windows 10/11 home user, single PC, no household: Microsoft Defender alone. Already running, 18/18 AV-TEST Feb 2026, no installer, no upgrade prompts, no data-broker history. Done.
- Windows 10/11 home user, single PC, wants extra layer: Microsoft Defender + Malwarebytes Free on-demand. Run a Malwarebytes scan weekly or after any suspicious download. Zero cost, no real-time conflict.
- Mixed Win + Mac household: Avast Free or AVG Free — both run on Windows and macOS (no free product still offers Sophos-style remote management).
- Mac-only household: Avast Free for Mac if you want the best free detection, or Avira Free Security for Mac if you want the quieter UX with Software Updater. Either on top of XProtect.
- Windows 7 / 8.1 hold-out (Defender not available): Avast Free or AVG Free — both still update on those legacy platforms, where most other vendors have dropped support.
- Households with 5+ Windows devices, single network: Panda Dome Free — unlimited Windows devices per account, lightest local agent we measured. Cloud-detection model means weaker offline protection on travelling laptops.
- Power user who wants a quiet third-party scanner instead of Defender: Bitdefender Antivirus Free Edition — the Bitdefender engine with minimal UI, Windows-only.
- Advanced user comfortable with sandbox prompts: Comodo Free Antivirus — containment-based default-deny posture. Configure-it-yourself, not recommended for relatives.
- IT technician building rescue media: Malwarebytes Free on a USB stick plus Microsoft Safety Scanner for one-shot offline scans. Honorable mention ClamWin still works for the same purpose if you have it on an existing rescue stick.
- Outside the US, want a Gen-Digital-independent engine: Bitdefender Free Edition (Romania, private). Clean of FTC consent orders and outside the Gen Digital consolidation.
FAQ — Free Antivirus
Is Microsoft Defender really good enough?
For most home Windows 10/11 users, yes. Defender scored 18/18 at AV-TEST February 2026 and posts Advanced+ at AV-Comparatives. It has matched paid vendors on detection for three full test cycles. The main reason to add a paid product on top is not better detection — it is bundle features (VPN, password manager, parental controls, identity protection) that Defender does not include.
Is Avast Free safe to use after the Jumpshot scandal?
The Jumpshot programme was shut down in January 2020, and the FTC issued a $16.5 million fine plus a ten-year ban on selling browsing data in February 2024. Avast's current privacy policy excludes those practices. The product itself is not collecting and selling browsing data today. Whether that history is disqualifying is a personal call; many r/privacy users will not go back, while mainstream reviewers treat the case as closed.
Can US users still install Kaspersky?
No new installs or paid upgrades. The US Commerce Department (BIS) rule effective 29 September 2024 prohibited new sales of Kaspersky software to US customers and ordered software updates to cease. Existing installations in the US no longer receive signature updates and should be migrated to another product. Outside the US, Kaspersky is unaffected.
Do I need real-time protection, or is on-demand enough?
You need real-time. On-demand-only tools like Malwarebytes Free catch threats that are already on the system; they do not stop them from executing in the first place. For daily-driver use, always have a real-time scanner running (Defender if nothing else). On-demand scanners are a second layer, not a substitute.
Can I run two free antiviruses at the same time?
Two real-time scanners will fight for the same file access hooks and slow the machine or crash the scan engine. Do not install Avast Free and Bitdefender Free and AVG Free at once. You can run a real-time AV (like Defender) alongside an on-demand tool (like Malwarebytes Free), because the on-demand tool only scans when you tell it to. That specific combo is the most-common community recommendation.
Are TotalAV, Scanguard, and PC Protect free?
No. All three operate a "free scan, paid removal" pattern: the product scans for free, reports threats for free, and requires payment to actually remove them. None is on this list. If you see them in Google search ads for "free antivirus", it is ad copy, not a free product.
What is the best free antivirus for Mac in 2026?
For free Mac protection, Avast Free and AVG Free both have Mac builds, with the same Jumpshot-era caveat as their Windows counterparts. Bitdefender Free does not have a Mac edition; Bitdefender for Mac is paid-only.
Does free antivirus protect against ransomware?
Partially. Defender includes Controlled Folder Access, which restricts write access to user-specified folders (Documents, Pictures, etc.) to trusted applications — that blocks most file-encryption ransomware. It is not enabled by default on all installs; check Windows Security > Virus & threat protection > Ransomware protection. Free Avast and AVG include basic ransomware shields; Bitdefender Free does not ship its Ransomware Remediation module with the free tier.
Should I uninstall Defender before installing another antivirus?
No. Defender automatically stands down when it detects a third-party real-time antivirus registered with Windows Security Center. It goes into "Periodic Scanning" mode (on-demand only) and lets the other product run. You do not need to manually disable anything. If you uninstall the third-party product later, Defender reactivates real-time protection automatically.
Is Microsoft Defender plus Malwarebytes Free the strongest free stack in 2026?
For most Windows 10/11 users, yes. Defender provides real-time protection at 18/18 AV-TEST detection with zero pop-ups, zero upsells, and zero data-broker history. Malwarebytes Free (on-demand only) layered on top catches the long-tail samples Defender occasionally misses on novel threats and post-infection behaviors. The two are explicitly engineered to coexist — Malwarebytes does not register as a second real-time AV, so Windows does not disable Defender. Run a Malwarebytes scan once a week or after any suspicious download. No money, no data-broker history, full-feature on-demand engine. The only stronger free option is paying nothing and installing nothing — sticking with Defender alone — which is also a valid 2026 choice.
Does Panda Dome Free really cover unlimited devices?
Yes — up to Panda’s own definition of "unlimited" (which is genuinely unlimited in practice, with no soft cap we have hit in testing). Panda frames it as unlimited subject to reasonable home use and one customer/household — generous, but not a business or fleet licence. One Panda account covers every Windows machine you install it on, no per-device license required. The catch: free tier is Windows-only (no macOS or Android on free), cloud-detection-first means weaker offline protection, and the installer offers a Panda Safe Web browser toolbar by default (uncheck during setup). For Windows-only households with five-plus devices on a single network, this is the most generous device-licensing free policy on the market in 2026. For mixed-OS households, those unlimited devices are Windows-only, so a Mac household needs a cross-platform free option like Avast or AVG instead.
Is Sophos Home still free?
No longer the way it used to be. Sophos discontinued its permanent free tier at the end of 2021, and Sophos Home is now a 30-day Premium trial. Because this list covers permanent free products, Sophos is no longer ranked here. For cross-platform free coverage, Avast Free or AVG Free both run on Windows and macOS.
Should I use Microsoft Defender or Bitdefender Free?
Use Defender if you want zero setup, no pop-ups and protection built into Windows. Use Bitdefender Free if you specifically want a quiet third-party engine on Windows. Both are solid, and there is no need to run them together.
Does free antivirus protect against scams?
Only partly. It can block some malicious sites and downloads, but scam texts, fake calls, QR-code scams and deepfakes usually need dedicated scam protection or paid-suite features. See our best antivirus for scam protection guide.
Is free antivirus enough for Windows 7?
It is only damage reduction. An unsupported Windows version stays risky even with antivirus, because the OS itself no longer gets security fixes. Upgrade the OS for banking, work and other sensitive accounts.
Final Verdict — The Best Free Antivirus
For nearly everyone running Windows 10 or 11: Microsoft Defender plus Malwarebytes Free for monthly on-demand scans. Zero cost, 18/18 AV-TEST protection, no pop-ups, no data-broker history, no renewal traps.
For Windows 7 / 8.1 hold-outs: Avast Free or AVG Free are still updated on those platforms, where Defender is not. Accept the Jumpshot-era history or migrate to supported Windows 11 hardware.
For households wanting cross-platform free coverage: Avast Free or AVG Free — both run on Windows and macOS. (Sophos Home dropped its permanent free tier in 2021, so it is no longer a free pick.)
For advanced Windows tinkerers: Bitdefender Antivirus Free Edition (minimal, quiet, Bitdefender engine) or Panda Dome Free (cloud-detection, lightweight, unlimited Windows devices).
For IT technicians building rescue media: Malwarebytes Free on a USB stick plus a clean Defender install on the recovered machine. The standalone Microsoft Safety Scanner (free, on-demand, supported by Microsoft) is the modern replacement for the ClamWin / classic-rescue-CD workflow.
If a single product had to take #1, it is Microsoft Defender — not because it is the most feature-rich, but because "already installed, 18/18 tested, no pop-ups, no upsells" is the highest-value proposition in the free-antivirus market in 2026.
On macOS? See our dedicated best antivirus for Mac guide.