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

Get powerful, real-time antivirus protection for your Windows PC or laptop and strengthen your privacy — all with Avast Free Antivirus. It's trusted by over 400 million people worldwide, download it free now.
Also available for Mac, Android, and iOS
2021
Editors' Choice
2022
Top Rated Product
2023
Top Product
2023
Best Free Anti-Malware
Award-winning free antivirus
Easy to install and simple to use
Wi-Fi network security
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 crucial, free virus protection for Windows 11
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.
Avast

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.

World-class protection
We’re proud to protect our users but we’re also proud of the many top awards our antivirus has earned.
435+ million users
Our vast global user base means we have the largest threat detection network in the industry — so we catch new threats fast.
30+ years of experience
When it comes to creating an antivirus that protects you from all angles — we know exactly what it takes.

Easy to install, effortless to use

Our free antivirus software for Windows 11 installs fast, and it’s easy 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 327,864,249 virus attacks on Windows 11 PCs over recent months.

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

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

Here’s what our users say:

“...earns excellent scores in our hands-on tests and independent lab tests...it offers much more than many competing commercial products...”
“Awarded Outstanding Security Product 2021 by AV-Comparatives.”
Avast Free Antivirus
Resolve security issues quickly and more
Avast’s antivirus 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 Windows 11 PC. And it’s free — so give it a try.
Free download
Also available for Mac, Android, or iOS

Already have Avast? We’ve got you covered

If you’re planning on upgrading from older versions of Windows, such as XP, Vista, 7, 8, 8.1 or 10, we’re ready to keep your Windows 11 PC virus-free. Just make sure you’re running the latest version of Avast before you upgrade your machine, and when you finish the transition to Windows 11, you’ll find us there, right where you left us, ready to protect your PC and everything you hold dear in it.

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