Download Free Antivirus Software
Get award-winning free antivirus that offers powerful protection against viruses and other malware, secures your Wi-Fi network, and strengthens your privacy.
Intelligent virus protection for any device
Simple to install, easy to use
This is no ordinary antivirus software
Powered by the industry's largest threat-detection network, machine-learning virus protection, and home network
security that won’t slow down your PC.
Stop viruses with intelligent antivirus
Detect and block viruses and other malware like spyware, ransomware, and phishing threats.
Stop ransomware threats
Prevent ransomware attacks and ensure your personal files, photos, and documents can’t be held hostage by hackers.
Block distractions & interruptions
Block pop-ups and other interruptions when gaming, watching movies, or presenting in fullscreen.
Protect your home Wi-Fi network
Scan your home network for threats, see who’s using it, and connect safely every single time.
How we’ve supercharged our free antivirus
Cloud-light, award-winning free virus protection
Over 435 million users trust us with their digital lives
Is there a 100% Free Antivirus?
Yes, there are various free antivirus software, although not all of them will provide you with full protection. Avast Free Antivirus is completely free and offers all the security you need.
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 other threats to your devices.
Is Avast antivirus really free?
Avast Free Antivirus really is free — you’ll never need to pay for it and it’ll provide you with essential online security and protection. If you’re looking for more security and privacy features, our Avast Premium Security software is the right product for you.
Will Avast One free antivirus software affect the performance of my device?
Avast One free antivirus software keeps your PC safe in real time without slowing it down. Get world-class protection against malware, phishing attacks, Wi-Fi threats, and more 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 One.
How do I detect and remove viruses and other malware?
Avast’s free antivirus software 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.
If you’re up for a challenge, you can also try to remove viruses and malware the old fashioned way.
Why is Avast one of the best free antivirus solutions?
Avast’s free antivirus software 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 industry-leading 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.
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 — so you’ll need Avast Free Antivirus to protect you on other browsers like Chrome and Firefox. Microsoft Defender also doesn’t score quite as highly with independent testing labs like AV-Comparatives. For comprehensive threat protection on your PC, go with Avast — the world’s most trusted antivirus.
How to install
Get protected right away by following these 3 easy steps:
All devices require an internet connection for automatic security and program updates.
Download award-winning free antivirus
Get security tips for your PC, straight from the experts
Webcam hacking and extortion is real. Find out if your webcam has been hacked, how to protect yourself and avoid living your own 'Black Mirror' nightmare.
Spam text messages are the ultimate nuisance. Here's how to block unwanted texts on Android & iPhone and stop spam before it starts.
Concerned about smart TV cameras and tracking? Find out if your Smart TV is spying on you and how to disable built-in cameras and voice-recording features.
Scareware is designed to trick users into downloading malicious software. Here's how to identify fake virus warning popups and how to remove scareware.
Discover the best free antivirus software for Windows as judged by leading security experts. Protect your PC from the top malware threats with a single click.
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.
What is a deepfake? Learn how AI technology is used in videos to swap faces of celebrities and others, and why deepfakes are a problem.
Learn what a disaster recovery plan (DRP) is and why it's crucial for businesses. Then learn how best to implement your IT disaster recovery plan.