Protect Your PC with Avast Free Antivirus for Windows

Over 435 million users worldwide trust Avast. Get our free, award-winning protection against viruses and other malware for Windows now.

Free download

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Using Windows 8.1? Download this instead

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Avast Free Antivirus

Free download

Award-winning antivirus for Windows

Avast has earned many accolades, but the best reward is the loyalty of our 435 million users. We enjoy serving the largest community of any antivirus company in the world — and we’re thrilled to continue protect you when you upgrade your PC to Windows .

The most downloaded software

Best Free Anti-malware

2020 Top Rated product

Get the best Windows antivirus

Protection that goes above and beyond

Windows provides very basic protection. Avast Antivirus secures not only your PC, but your entire home network as well — and it comes with advanced features such as Software Updater, Do Not Disturb Mode, and more.

Official partners with Microsoft

With Avast and Microsoft in your corner, there’s not much that can get in your way. When Microsoft supports Avast Antivirus on all Windows machines, it sends a clear message: we’re respected for what we do. That’s why industry experts like PC Magazine and PC Advisor rate us highly too.

No slowing you down

We’re proud to be called the "Antivirus with the lowest impact on PC performance” by AV Comparatives. Whether you use your PC for gaming or for work, Avast gives you the biggest protection in the smallest package possible

It’s free forever

Get advanced Windows antivirus protection against online threats like viruses and other malware. But we don’t stop there. We offer extra security features such as behavior shield, remote assistance, browser cleaning and more — yep, you guessed it — completely free.

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 or 8.1, we’re ready to keep your new Windows 10 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 10, you’ll find us there, right where you left us, ready to protect your PC and everything you hold dear in it.

System Requirements

It doesn’t take much to have a machine protected by Avast. All you need is a PC with 256 MB+ RAM and 1.5 GB of hard disk space. If your Windows PC has that (which it very likely should), you’ll be good to go.

The people have spoken

Very nice! It saved me from a spion virus that was stealing my passwords!

Tim

I feel secure and have peace of mind knowing I am safe. Thank you.

Steven

Awesome! In less than 30 days of using Avast, I could tell we were going to have an even longer relationship! No slowdowns, no malware, and no flaws in general, great job!

Michael

I’ve been using Avast since almost 2009... since then I've never turned to any other antivirus. Don't take my word for it, just try it & see for yourself...

Soumik

It is the best antivirus ever created!

Ognjen

We’ve been using Avast for more than 10 years now. It’s amazing that you can get something as good as this for free.

Austin

Definitely the best antivirus & anti-malware product out on the market. I recommended it to my family and friends!

Bray

It’s the best antivirus ever. I strongly recommend it.

Siyabonga

Excellent antivirus program. I’ve been using this program for 5-6 years without a single issue.

Norm

Hats off to the top notch features Avast provides. My favorite antivirus of all time.

Salman

Great product, Never got a virus since I started using it several years ago.

David

The best free antivirus no doubt. I’ve been using it since 2006 till now without any issues or viruses on my machine.

Sanjeev

The best antivirus for Windows .

Shrish

My favourite antivirus because of its high security and no slow down. Thanks.

3xper'

The best antivirus.