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Avast Free Antivirus

Essential protection that’s light, powerful, and completely free

6 layers of security
Powerful virus scanner
No slowdowns or interruptions

Enjoy cloud-light, award-winning free virus protection

Packed with the largest threat-detection network, machine-learning virus protection and home network security that won’t slow down your PC.

Easy to install,
effortless to use

Avast’s antivirus software scans for security and performance issues and helps you to fix them instantly. It also protects you in real time by analyzing unknown files long before they reach your device.

What else is 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.

Protect your home Wi-Fi network

Scan your home network for threats, see who’s using it, and connect safely every single time.

Block distractions & interruptions

Block pop-ups and other interruptions when gaming, watching movies, or presenting in fullscreen.

Stop ransomware threats

Stop ransomware attacks and ensure your personal files, photos, and documents can’t be held hostage.

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.

Intelligent Antivirus
Detect and block viruses and other malware like spyware, ransomware, and phishing threats.
Automatically send suspicious files for analysis in the cloud, and push a cure to all Avast users if it's a threat.
Wi-Fi Inspector
Automatically detect weaknesses in your home Wi-Fi and strangers piggybacking on your network.
Smart Scan
Find all those cracks which allow malware to slip in, from unsafe settings and passwords to suspicious add-ons and out-of-date software.

Layer upon layer of security

Avast Free Antivirus uses multiple layers of security to keep you safe from even the newest, never-before-seen threats.

Over 435 million users worldwide trust Avast

Here’s what users say about it:

I have used Avast for a few years. The protection is the best for the money. I also cover my phones with Avast and I haven’t had any problems yet.

Ryan R.

I have used Avast for many years. The reason is very simple: you offer a great free version that actually works. This lets me afford the other amazing services you offer when needed, like Avast Cleanup.

Eric S.

I've used Avast Free Antivirus on my computers, tablets, and smart phones for many years. It updates frequently and automatically. It automatically scans and protects me from malicious web sites. It does what I need. What more could I ask?

Daryl C.


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.
compatibility icon Windows 10 and Windows 11 compatible
Avast Free Antivirus

Fast, light and powerful free protection.
It’s just a click away

Get security tips for your PC, straight from the experts


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