Recommended Free Tools
For a Windows home PC, the strongest Comodo alternatives to compare are Microsoft Defender Antivirus, Avast Free Antivirus, AVG Antivirus Free, Bitdefender Total Security, ESET Security Ultimate, and Norton 360. Start with Defender if you want built-in protection without buying another product; choose a free third-party option if you want to compare a separate antivirus, or evaluate paid suites if their additional features suit your needs. Recent independent tests support all six as candidates, but they measure different things and do not establish one universal winner.
Which Comodo alternative should you choose?
| What matters most | Option to compare | What the evidence says |
|---|---|---|
| Built-in Windows protection | Microsoft Defender Antivirus | Windows 11 includes Defender among its security features. In AV-TEST’s July–August 2026 Windows evaluation, Defender scored 6/6 for protection, 5.5/6 for performance, and 6/6 for usability. |
| Free third-party antivirus | Avast Free Antivirus or AVG Antivirus Free | Both tested free editions scored 6/6 in protection, performance, and usability in AV-TEST’s July–August 2026 evaluation. |
| Paid security suite | Bitdefender Total Security, ESET Security Ultimate, or Norton 360 | Each scored 6/6 in all three AV-TEST categories in the same evaluation. Check current plan features and terms before purchasing; the test scores do not compare subscription value. |
| Different strengths across independent tests | Compare the product and test category, not just the overall label | AV-Comparatives’ 2025 awards recognized different products for real-world protection, malware protection, performance, advanced threat protection, and false positives. |
These are Windows-focused recommendations, not a cross-platform ranking. Test results apply to the specified product editions, versions, periods, and lab methods; they are comparative evidence, not a guarantee of future protection or identical results on every PC.
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Is Microsoft Defender enough for a home Windows PC?
Microsoft Defender Antivirus is the no-extra-purchase starting point for Windows users who want built-in antivirus protection. Microsoft identifies Defender Antivirus and Smart App Control as built-in Windows 11 security features. In AV-TEST’s July–August 2026 evaluation, Microsoft Defender Antivirus (Consumer) version 4.18 earned 6/6 for protection and usability and 5.5/6 for performance. That is a strong result in this test, though it does not by itself determine whether Defender meets every household’s needs.
Consider what you want beyond antivirus detection before switching. The cited lab results do not establish which product has the best fit for a particular person’s preferred controls, support needs, or additional suite features.
#1 Best Overall
![Norton 360 Deluxe 2027 Antivirus, 3 Devices, Auto-Renews [Download]](https://m.media-amazon.com/images/I/41qw3FS3qLL._SL160_.jpg)
- ONGOING PROTECTION Download instantly & install protection for 3 PCs, Macs, iOS or Android devices in minutes!
- TOP-PERFORMING VPN Faster speeds, more server locations, and greater connection control to protect your privacy across all your devices, including Smart TVs.
- ADVANCED SCAM PROTECTION Help spot hidden scams online. With the built-in Genie AI assistant, you’ll never wonder if a message or email is suspicious again.
- REAL-TIME PROTECTION Advanced security protects against existing and emerging malware threats, including ransomware and viruses, and it won’t slow down your device performance.
- DARK WEB MONITORING Identity thieves can buy or sell your information on websites and forums. We search the dark web and notify you should your information be found.
Best free third-party alternatives to Comodo
Avast Free Antivirus
AV-TEST’s July–August 2026 evaluation gave Avast Free Antivirus version 26.6 a perfect 18/18: 6/6 each for protection, performance, and usability. In AV-Comparatives’ 2025 consumer awards, Avast received Gold for performance and was among the Top-Rated Products. These are separate assessments of different categories and periods.
AVG Antivirus Free
AVG Antivirus Free versions 26.6 and 26.7 each scored 18/18 in AV-TEST’s July–August 2026 evaluation. AV-Comparatives also named AVG a 2025 Top-Rated Product and awarded it Gold for performance. The results apply to the named free edition; they do not establish that AVG and Avast are identical or that either free product includes the features of a paid tier.
Rank #2
- THREAT DETECTION – Stay one step ahead. Suspicious links, risky sites, viruses, and scams, caught automatically before they reach you.
- PERSONAL INFO PROTECTION – Keep your personal info safer. Identity monitoring watches for your exposed info and tells you what to do about it.
- SECURE CONNECTIONS – Just a few easy clicks, and we'll automatically protect your info on public Wi‑Fi, every time you connect.
- GUIDED ACTION – Know what matters and what to do next. Clear alerts and simple guidance make it easy to take action.
- MORE THAN ANTIVIRUS – Scam protection, identity monitoring, VPN, web protection, and antivirus work together to protect you, all in one place.
Paid alternatives to compare
Bitdefender Total Security
Bitdefender Total Security version 27.0 received 18/18 in AV-TEST’s July–August 2026 Windows test. AV-Comparatives named Bitdefender a 2025 Top-Rated Product and awarded it Silver for real-world protection, Bronze for malware protection, and Gold for advanced threat protection. The different awards illustrate why a single test category should not be treated as a universal ranking.
ESET Security Ultimate
ESET Security Ultimate versions 19.1 and 19.2 scored 18/18 in AV-TEST’s July–August 2026 evaluation. AV-Comparatives named ESET a 2025 Top-Rated Product and awarded it Gold for advanced threat protection. The AV-TEST result is for Security Ultimate specifically; it should not be transferred automatically to every ESET edition.
Rank #3
![Norton 360 Deluxe 2027 Antivirus, 5 Devices, Auto-Renews [Download]](https://m.media-amazon.com/images/I/41IYV5zGyCL._SL160_.jpg)
- ONGOING PROTECTION Download instantly & install protection for 5 PCs, Macs, iOS or Android devices in minutes!
- TOP-PERFORMING VPN Faster speeds, more server locations, and greater connection control to protect your privacy across all your devices, including Smart TVs.
- ADVANCED SCAM PROTECTION Help spot hidden scams online. With the built-in Genie AI assistant, you’ll never wonder if a message or email is suspicious again.
- REAL-TIME PROTECTION Advanced security protects against existing and emerging malware threats, including ransomware and viruses, and it won’t slow down your device performance.
- DARK WEB MONITORING Identity thieves can buy or sell your information on websites and forums. We search the dark web and notify you should your information be found.
Norton 360
Norton 360 versions 26.6 and 26.7 scored 18/18 in AV-TEST’s July–August 2026 test. AV-Comparatives named Norton a 2025 Top-Rated Product, awarding it Gold for real-world protection and Silver for performance. These results concern the tested Norton 360 edition, not every Norton product.
Before buying any paid suite, compare the current plan’s device limit, operating-system coverage, included services, renewal price, and cancellation terms. Those plan details can change and are not established by the lab scores cited here.
Rank #4
- THREAT DETECTION – Stay one step ahead. Suspicious links, risky sites, viruses, and scams, caught automatically before they reach you.
- PERSONAL INFO PROTECTION – Keep your personal info safer. Identity monitoring watches for your exposed info and tells you what to do about it.
- SECURE CONNECTIONS – Just a few easy clicks, and we'll automatically protect your info on public Wi‑Fi, every time you connect.
- GUIDED ACTION – Know what matters and what to do next. Clear alerts and simple guidance make it easy to take action.
- MORE THAN ANTIVIRUS – Scam protection, identity monitoring, VPN, web protection, and antivirus work together to protect you, all in one place.
What the independent tests measure
AV-TEST: protection, performance, and usability
AV-TEST evaluated 15 home-user security products on Windows in July and August 2026. It used the most current publicly available versions, default settings, updates and cloud queries, and realistic scenarios. Each product could earn up to 6 points in protection, performance, and usability, for a maximum of 18. Its results show how products performed under those test conditions, not how every setup will perform.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesAV-Comparatives: multiple categories, different winners
AV-Comparatives’ 2025 Consumer Summary Report, released January 14, 2026, covered 19 Windows consumer security products. Its Top-Rated Products were Avast, AVG, Bitdefender, ESET, G DATA, Kaspersky, and Norton. Awards varied by category: Norton earned Real-World Protection Gold; Kaspersky earned Malware Protection Gold; Avast and AVG earned Performance Gold; Bitdefender and ESET earned Advanced Threat Protection Gold; and Kaspersky earned False Positives Gold.
Best Value
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- AWARD WINNING Antivirus, anti-malware, anti-spyware & more
- 24/7 REAL TIME PROTECTION against emerging malware threats, including ransomware and viruses- without slowing you down.
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- UNMATCHED THREAT DETECTION: We found malware on 40 percent of devices that already had a third-party antivirus installed.
Its March 2026 Malware Protection Test, released April 15, 2026, assessed 20 consumer security solutions against 10,000 recent malware samples, considering protection and false positives. The Advanced+ group included Avast, AVG, Kaspersky, Norton, Fortect, Bitdefender, G DATA, Microsoft, Total Defense, and VIPRE. The result is useful evidence for that test dimension, not a complete measure of every product feature.
Quick Recap
How to make the final choice
- Decide whether you need a separate product. If built-in Windows protection meets your needs, compare its current settings and results before adding another antivirus.
- Choose free or paid based on features, not score alone. The cited AV-TEST results show strong performance from both free editions and paid suites; they do not establish that paying guarantees better protection.
- Match the edition to the evidence. Avast Free Antivirus, AVG Antivirus Free, Bitdefender Total Security, ESET Security Ultimate, Norton 360, and Microsoft Defender Antivirus (Consumer) are the specific editions named in the 2026 AV-TEST results.
- Use more than one category when comparing labs. Protection, performance, usability, and false positives answer different questions. Prefer evidence relevant to the trade-off you care about.
- Verify current subscription terms before checkout. Product editions and plans change; confirm features, device coverage, renewal pricing, and cancellation terms with the vendor for your region.
Sources
- Microsoft: Windows security features
- AV-TEST: home-user antivirus testing for Windows
- AV-Comparatives: 2025 Consumer Summary Report
- AV-Comparatives: March 2026 Malware Protection Test
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