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Get the world’s #1 antivirus for free.

Avast Free Antivirus protects your computer against viruses and malware, and it helps you protect your home network against intruders.

Block and remove spyware with Avast

Avast Free Antivirus includes anti-spyware protection to keep your personal information, banking details and online activity private.

Avast ransomware protection

Offering full malware protection, Avast Free Antivirus analyses unknown files to detect and block ransomware attacks before they affect you.

Real-time malware detection from Avast

Avast Free Antivirus works quietly in the background, analyzing unknown files and applications in real time, to block malware on your PC.

Powerful protection against WannaCry

Intelligent, real-time protection at no cost – Avast Free Antivirus helps you stay safe from nasty ransomware attacks like WannaCry.

Best free antivirus for Windows 10

Avast Free Antivirus is light, smart and powerful. Our world leading antivirus detects and stops all types of malware on your Windows 10 PC.

Best free antivirus for Windows 7

Avast Free Antivirus is light, smart and powerful. Our world leading antivirus detects and stops all types of malware on your Windows 7 PC.

Best free antivirus for Windows 8

Avast Free Antivirus is light, smart and powerful. Our world leading antivirus detects and stops all types of malware on your Windows 8 PC.

FREE DOWNLOAD
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What’s 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.

You

But I’m backing up my files to the cloud.

Avast

That’s a good habit. But the problem is that the ransomware-encrypted version of your files gets immediately synced with the cloud too...so unless your backup solution stores historical versions of your files, you’re in trouble.

Avoid becoming the victim of digital extortion

Ransomware is quickly becoming one of the most common — and dangerous — types of malware out there. Avast Free Antivirus protects your devices against havoc-wreaking ransomware so you don’t become the victim of digital extortion.

TECH CORNER
Like the name suggests, ransomware is the digital equivalent of a hostage situation. Hackers use ransomware to encrypt the personal files on your computer or phone, preventing you from accessing them until you — you guessed it — pay a ransom. Avast Free Antivirus blocks ransomware before it can get anywhere near your files — let alone encrypt them. And don’t worry about accessing and using all of your files (documents, photos, etc.) as you normally would; ransomware protection works quietly in the background.
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Game or movie time. Now uninterrupted

We’ve renamed Game Mode and taught it some new tricks. Now called Do Not Disturb Mode, it blocks distracting popups whether you’re gaming, watching movies, or presenting in fullscreen.

Introducing Behavior Shield

We don’t just check your applications for malware. We now keep an eye on their behavior to make sure they don’t suddenly go rogue.

Avast Free Antivirus

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