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Strengthen your PC’s security with Avast Free Antivirus for Windows 11

Get powerful real-time protection against viruses and other malware. Strengthen your Windows 11 security and privacy with Avast Free Antivirus — it's trusted by over 400 million people worldwide, download it free now.

Get it for Mac, Android, or iOS

2021
Editors' Choice
2021
Outstanding Security Product
2021
Top Product
Award-winning virus and malware protection
Home Wi-Fi network security
Easy to install, Effortless to use
30+ years of protecting our users

Windows 11 virus protection that comes with extra features

In today’s digital world, sometimes you need more than antivirus to give you the protection you need — so we’ve included some advanced features alongside our award-winning free antivirus, so you’re covered from all angles.

Get essential free antivirus protection
Strengthen your Windows 11 PC security and protect your entire home Wi-Fi network, plus get advanced tools like anti-malware security, Wi-Fi security scans, and more — all completely free.
Browse, shop, and bank securely
Protect your financial info while you browse, shop, and bank online. Scan websites to make sure they’re legitimate, and avoid fake websites trying to steal your information.
Protect your personal files
Keep sensitive information safe. Protect your personal photos, files, and documents and don’t let them become hostage to ransomware.

You can rely on Avast to protect you

Here’s why Avast is one of the most trusted, reliable, and experienced cybersecurity experts in the world.

Easy to install, effortless to use

It only takes moments to install Avast Free Antivirus and the software is simple to use. Clear interfaces and settings allow you to set and automate your security, so it’s always running quietly in the background, protecting you in real time, 24/7. And it’s always free — so give it a try now.

100% free protection

Get award-winning antivirus and protect your Windows 11 PC from viruses and other malware — for free, forever. Plus, get extra features like email shields, hack alerts, Wi-Fi security scanner, and more, all included for free.

Avast Free Antivirus never sleeps

We’re proud to protect millions of Windows PCs. But don’t just take our word for it — see the graph below which shows that
Avast has prevented virus attacks on Windows 11 PCs over recent months.
The United States’ Windows 11 PCs are the third most attacked in the world.

Number of attacks prevented against Windows 11 PCs in recent months:

Already have Avast? We’ve got you covered

If you’re upgrading from older versions of Windows, such as XP, Vista, 7, 8,8.1, or 10, you can keep your new Windows 11 PC virus-free. Make sure you’re running the latest version of Avast before you upgrade. Once you’ve transitioned to Windows 11, you can browse the internet with complete confidence, knowing that both your online security and computer are in safe hands.

How to install

Get protected right away by following these 3 easy steps:
Step 1
1. Download
Download the file from our page.
Step 2
2. Open the file
Open the downloaded file and approve the installation.
Step 3
3. Install the file
Run the installer and follow the simple instructions.

System requirements

All devices require an internet connection for automatic security and program updates.

PC with Windows 11, 10, 8.1, 8, or 7 (both the 32 and 64-bit versions, excluding Starter and RT editions), 1 GB RAM and 2 GB of hard disk space.
Mac running macOS 10.12 (Sierra) or later.
Android phone or tablet running operating system Google Android 6.0 (Marshmallow, API 23) or higher.
iPhone or iPad running iOS 12.0 or higher.

FAQ

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