Avast Free Antivirus
Essential protection that’s light, powerful, and completely free
Avast Free Antivirus
Easy to install,
effortless to use
Over 435 million users worldwide trust Avast. Join them.
What’s inside the latest version?
A beautifully intuitive interface, advanced application protection, a new passive mode for running multiple security products in parallel — and a little something for you gamers and movie buffs.
Just a click of our fresh, new, easy-to-use interface checks everything from your passwords to your home network security.
We’ve renamed Game Mode and taught it some new tricks. Now called Do Not Disturb Mode, it blocks distracting popups whether you’re gaming, watching movies, or presenting in fullscreen.
We don’t just check your applications for malware. We now keep an eye on their behavior to make sure they don’t suddenly go rogue.
This is no run-of-the-mill free antivirus
On top of our latest features, we cover essential intelligent threat-detection and real-time protection with such a light touch on your PC, you never even know it’s there.
Over 435 million users worldwide trust Avast
Here’s what users say about it:
Why is 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 that lets us protect our entire community in real time against online threats whenever they appear.
Our powerful antivirus engine is just one of the many reasons why Avast Free Antivirus consistently earns high praise and top awards from PCMag, AV-Comparatives, AV-Test, and other independent experts. We have one of the best antivirus software solutions available, because we have the right antivirus protection for all your needs.
How does Avast Free Antivirus protect against so many types of threats?
Trusted by over 435 million users around the world, Avast uses advanced machine learning techniques to protect against ransomware attacks and other emerging threats. Avast Free Antivirus software detects, blocks, and removes all types of malware — viruses, adware, spyware, Trojans and more. You’ll also get security for your Wi-Fi network and real-time defense against phishing attacks, unsafe websites and computer exploits.
Why is Avast Free Antivirus even better than Windows Defender?
Now known as Microsoft Defender, Windows Defender isn’t enough to match leading third-party PC antivirus programs. While it’ll keep your computer relatively safe against most types of malware, its anti-phishing protection is limited to Microsoft Edge — you’ll need Avast Free Antivirus to protect you on other browsers like Chrome and Firefox. Microsoft Defender also doesn’t score quite as high with independent testing labs like AV-Comparatives. For comprehensive threat protection on your PC, go with Avast — Over 435 million users worldwide trust Avast.
How does Avast Free Antivirus affect performance?
Avast Free Antivirus keeps your PC safe in real time without slowing it down. Get world-class protection against malware, phishing attacks, Wi-Fi intrusions, and other threats with our advanced cybersecurity tool that’s both comprehensive and light on your system’s resources.
Looking for a performance boost? Speed up your PC and get rid of unnecessary files with Avast Cleanup Premium, or protect and optimize your PC all at the same time with Avast Ultimate.
How do I detect and remove viruses and other malware?
Avast Free Antivirus detects and blocks all types of malware in real time to prevent them from infecting your computer. At the same time, it scans your PC to remove viruses and other malware automatically before they can do real damage.
Feeling up for a challenge? You can also try to remove viruses and malware the old fashioned way.
Fast, light and powerful free protection.
It’s just a click away
Get security tips for your PC, straight from the experts
A computer virus is a type of malware that can spread quickly between computers and other devices. Learn how viruses work and how to protect against them.
Want to learn about malware? Read this ultimate guide to find out what malware is, how it works, how it spreads and what you should do to protect yourself.
Have you noticed your Windows PC behaving strangely? Find out how to detect and remove viruses and other malware in this complete guide.
Is your router infected with malware? Learn how to check a router for malware and viruses, and how to remove any malicious software you find.
Find out how to check for and detect keyloggers. Then learn how to remove them to protect your personal information and sensitive data.
Ransomware is a serious threat to individuals, businesses, and even hospitals. Learn how ransomware works and block hackers from holding your files hostage.
What is a bot? Find out the meaning of a bot, how they work, and learn about the different types of computer bots.
Are you getting the most out of your Mac? Here's all you need to know about Apple hardware tests, diagnostics, benchmarks, and speed.