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Award-winning free virus protection with cloud support

Also included: the largest network for threat detection, machine learning protection against viruses and a home network security solution that leaves your PC's performance unaffected.

Easy to install,
effortless to use

Avast Free Antivirus scans for security and performance issues and tells you how to fix them.

Protects you in real time by analyzing unknown files before they reach you. So relax: with Avast you have virus protection,
which enjoys the greatest trust worldwide.

What's new in the latest version?

An attractive, intuitive interface, the latest application protection, a new passive mode for running several security products at the same time - and a certain extra for the gamers and film lovers among you.

Designed for effortless security

Just one click in our fresh, new and user-friendly interface checks everything from your passwords to home network security.

Time for games or movies.
Now without interruption

We renamed the game mode and taught it a few new tricks. Now known as Do Not Disturb mode, it blocks annoying pop-up notifications, for example when playing games, watching movies or during a full-screen presentation.

The new behavior protection

We don't just check your applications for malware. We also monitor their behavior to make sure they don't suddenly become malicious.

This is not an off-the-shelf antivirus

In addition to our latest features, we also offer essential, intelligent threat detection and real-time protection that is so resource efficient that you won't even notice it.

The world's most popular
Virus protection

But you don't have to take our word for it.

Your software's user interface is just fantastic. A great job for years. I can't say enough good things about it!

Thank you Avast for your excellent work. I use your antivirus software on both Mac OS X and my Windows computers. You have the best products out there, period.

I've been using Avast for over a year now and I think it's one of the best free protection software out there right now.

Frequently asked questions (FAQs)

What Makes Avast One of the Best Free Antivirus Solutions?
Avast Free Antivirus combines cutting-edge, AI-driven cybersecurity with a massive threat detection network of over 435 million users to protect our entire community from online threats in real time.

Our industry-leading antivirus engine is just one of the many reasons Avast Free Antivirus regularly receives top ratings and awards from PCMag, AV-Comparatives, AV-Test, and other independent experts. We have the right virus protection for all your requirements.
Why is Avast Free Antivirus even better than Windows Defender?
Windows Defender, now known as Microsoft Defender, lags behind leading PC virus protection programs from other companies - and is therefore not enough. While Windows Defender is reasonably good at protecting your computer from most types of malware, anti-phishing is limited to Microsoft Edge. For protection in other browsers such as Chrome or Firefox, you need Avast Free Antivirus. In addition, Microsoft Defender is not rated as highly by independent test labs like AV-Comparatives. So get Avast, the world's most popular anti-virus protection - to protect your PC against threats.