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Free Malware Scanner and Removal Tool

Find and remove malware and other threats. Avast One offers free, real-time anti-malware protection against current and future infections. Secure your device with powerful malware-fighting software. Get free protection, or upgrade now for premium online security.

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2021
Editors' choice
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2021
Editor's choice
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2021
Top Rated
Product

Powerful, free anti-malware protection

We’ve packed the world’s largest threat-detection network and machine-learning malware protection into a single, lightweight malware scan and removal tool that won’t slow down your PC. And did we mention it’s 100% free?

Avast One lets you:

Avast One is filled with other free features, too, including a Do Not Disturb Mode to block unwanted distractions, a smart Behavior Shield that automatically detects suspicious activity, and a whole lot more — all 100% free.

Stay safe with award-winning malware protection

We’re proud to have secured the coveted 2021 Editors’ Choice award from PCMag. “The new Avast One Essential incorporates all the powerful virus-fighting technology that’s made Avast famous.”

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Avast One is powered by the same world-class antivirus engine that’s been winning awards for years. Independent security testing labs and industry experts agree that Avast’s cybersecurity protection is among the best in the world.

  • PC-mag_logo2

    PC Mag: Editors’ Choice, 2021

  • tech-rada-logo-27x27

    TechRadar: 5 stars, 2021

  • AV_test-logo2

    AV-TEST: Top Product, AV Test Certified, 2021

  • award-av-comparative-plkaceholder

    AV Comparatives: Top Rated Product Award, 2020

  • award-av-comparative-plkaceholder

    AV Comparatives: 2018 Product of the Year

  • award-av-comparative-plkaceholder

    AV Comparatives: Advanced+ in malware protection and removal, 2018

Anti-malware protection trusted by over 400 million users

But don’t just take our word for it.

Get rid of malware from your Mac or mobile, too

Think your Mac is infected? Afraid you’ve downloaded malware to your Android phone or tablet?
Don’t panic. We’ve got you covered there, too.

Our real-time antivirus for Mac scans for, removes, and stops all kinds of malware — from viruses to spyware to ransomware — as well as a wide range of other online threats to keep your Mac safe. Defend against phishing attacks and avoid malicious websites with the protection of one of the world’s largest threat-detection networks.

Looking for free anti-malware for mobile? Avast’s antivirus protection for Android brings all the power of our award-winning cybersecurity apps directly to your phone. Scan for malware and remove it, secure your Wi-Fi connection, and protect against all sorts of malicious software and other internet threats.

Download our free malware cleaner

Avast One removes hidden malware, blocks future malware, and protects against nasty viruses, spyware, ransomware, and more. 100% free.

System requirements

We’re not demanding. All you need is a PC with Windows 11, 10, 8.1, 8 or 7*, 1 GB RAM 
and 2 GB of hard disk space. And that’s it.

* Both the 32- and 64-bit versions, excluding Starter and RT editions.

Windows 10 compatible

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Editor's
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Get free malware protection for PC with Avast One

FREE DOWNLOAD
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Editor's
choice

Get free malware protection for Mac with Avast One

FREE DOWNLOAD
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Editor's
choice

Get free malware protection for Android with Avast One

FREE INSTALL
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Editor's
choice

Get free malware protection for iPhone with Avast One

FREE INSTALL