Antivirus for Windows 11 | Free Download Here

Free download

Also available for Mac, Android, and iOS

2021

Editors’ Choice

2024

Top Rated Product

2023

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.

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.

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.

Award-winning protection

We’re proud to offer our users world-class protection against cyberthreats, supported by the many awards our antivirus has earned.

Hundreds of millions of 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.

Award-winning protection

We’re proud to offer our users world-class protection against cyberthreats, supported by the many awards our antivirus has earned.

Hundreds of millions of 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.

Free Download

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 2 317 553 210 virus attacks on Windows 11 PCs over recent months.

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

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 2 317 553 210 virus attacks on Windows 11 PCs over recent months.

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

Check out these 5-star reviews from our customers:

I use the free version largely because of it's simplicity. I don't want a lot of gizmos and gadgets. It is a wonderfully trouble free experience and has been for many years. I am very grateful for it's existence.

Paul S.

2023-08-20

“...earns excellent scores in our hands-on tests and independent lab tests...it offers much more than many competing commercial products...”

Awarded Top-Rated Product 2023  by AV-Comparatives

“...earns excellent scores in our hands-on tests and independent lab tests...it offers much more than many competing commercial products...”

Awarded Top-Rated Product 2023  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, and 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.

You may still be wondering...

FAQs

It’s 100% compatible. Microsoft supports Avast Free Antivirus on all Windows 11 devices. You can easily download and run the installer in minutes and be protected right away.

Windows 11 has a built-in security center where you can enable basic security tools. Even though Microsoft Windows comes with Windows Defender built-in, it’s not enough protection. Luckily, Microsoft makes it easy to install antivirus software that specifically provides advanced protection and security, such as Avast Free Antivirus.

This antivirus can detect any security weaknesses in real time and blocks viruses, spyware, Trojans, and other types of malware — all completely free.

Yes, it’s safe and free to upgrade to Windows 11, just as Windows 10 was a free upgrade for PCs running Windows 7 and Windows 8. As long as your PC meets Microsoft's minimum system requirements, you’ll be able to access Windows 11 minimal security features.

To make your PC safer, we recommend using an effective free antivirus to add an extra layer of online security and a secure VPN to encrypt your connection for greater privacy.

Windows 11 is a more secure operating system than older versions of Windows. To get the most secure version of Windows 11, you can find new security features in the Windows Operating System.

You can combine the new security features with antivirus software to make your PC even more secure. Avast Free Antivirus can make sure malicious websites and vulnerable Wi-Fi networks don’t jeopardize your online safety. It also includes advanced features like web and email shields, Wi-Fi security scanners, and more.

Not at all. Based on AV-Comparatives, Avast Free Antivirus provides the lowest impact on PC performance. Whether you use your PC for gaming or for work, Avast gives you reliable protection without affecting the performance of your PC at any time.

You can boost the performance of your PC further by using our cleanup tool to clean up, speed up, and tune up your device.

Yes, Windows comes with its own built-in protection called Windows Defender, which offers basic protection but won’t fully protect you against all threats. It’s recommended that you install an individual antivirus, like Avast Free Antivirus, to ensure that there are no gaps in your security and that you’re always completely protected — even from advanced threats.

Windows firewall will provide some protection but we recommend using an advanced firewall like the one included in Avast Free Antivirus. It offers comprehensive protection against unauthorized communications and intrusions to your system.

Visit our Support Center for more FAQs

How to install

Get protected right away by following these 3 easy steps:

Step 1

1. Download

Click here to download.

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

Windows 10 and Windows 11 compatible

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.

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Almost Done!

Complete installation by clicking your downloaded file and following the instructions.

Almost Done!

Complete installation by clicking your downloaded file and following the instructions.

Download free antivirus software for Windows 11

Windows 11 virus protection that comes with extra features

Get crucial, free virus protection for Windows 11

Browse, shop, and bank securely

Protect your personal files

Get crucial, free virus protection for Windows 11

Browse, shop, and bank securely

Protect your personal files

You can rely on Avast to protect you

Award-winning protection

Hundreds of millions of users

30+ years of experience

Award-winning protection

Hundreds of millions of users

30+ years of experience

Easy to install, effortless to use

100% free protection

Avast Free Antivirus never sleeps

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

Avast Free Antivirus never sleeps

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

Check out these 5-star reviews from our customers:

I use the free version largely because of it's simplicity. I don't want a lot of gizmos and gadgets. It is a wonderfully trouble free experience and has been for many years. I am very grateful for it's existence.

Paul S.

Resolve security issues quickly and more

Almost Done!

Complete installation by clicking your downloaded file and following the instructions.

Already have Avast? We’ve got you covered

You may still be wondering...

FAQs

Is Avast Free Antivirus compatible with Windows 11?

Does Windows 11 need an antivirus?

Is it safe to upgrade to Windows 11?

Does Windows 11 have better security than older versions?

Will Avast Free Antivirus affect the performance of your Windows 11 PC?

Does Windows 11 come with antivirus software?

Is Windows 11 safe?

Is the Windows 11 firewall sufficient?

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Get security tips and advice straight from the experts

Get privacy tips and advice straight from the experts

Almost Done!

Complete installation by clicking your downloaded file and following the instructions.