It got perfect 100% protection scores in AV-Test’s most recent tests, 99.5% in AV Comparatives’ latest real-world test and 100% in SE Labs’ tests.

System impact isn’t as low as you might expectīuilt into Windows 10 and 11, Microsoft Defender is the one of the most consistently reliable antivirus suites around.

You will get far more features from paid-for services such as McAfee Plus Advanced and Norton 360, but if you don’t want to spend a penny while still seeing top-grade security, then Avast One Essential is our top recommendation. It even has a built-in do not disturb mode that’s automatically activated whenever you run a fullscreen application.

It has a number of useful features, carrying out real-time scanning of potential threats, as well as on-demand and scheduled system scans. Avast One Essential becomes more useful if you’re using an outdated operating system.Īvast One Essential is partly funded by advertising and partner promotion. That said, the performance difference isn’t big enough to make an upgrade essential if you’re using Windows 11. It did see a few false positives, suggesting it may be a little too militant, but it’s still great to see a third-party antivirus post even more impressive performance results than Microsoft Defender Antivirus, which is built into Windows 11 by default. Avast One Essential has ascended to the top of the list as the very best free antivirus of 2023, and that’s for one key reason: it prevented 100% of malware in the latest string of tests.

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