- Security
- Privacy
- Performance
Remove ransomware and protect your Windows, Android, Mac, or iOS device with Avast Free Antivirus — the award-winning, 100% free anti-ransomware tool. Stop dangerous ransomware and other threats before they can harm your files.
Avast has been stopping ransomware for years, and we’re only getting better with age. With Avast Free Antivirus, you’ll enjoy the world’s largest threat-detection network and machine-learning ransomware protection in a single, lightweight security tool. Plus, it’s 100% free.
We’ll scan for and remove the malware that’s putting your PC at risk, no matter where it’s hiding.
Alerts you immediately if unusual app behavior is detected that may indicate a threat.
If unusual app behavior is detected, you’ll see an immediate alert to block the threat.
Blocks malicious files and programs from opening, and alerts you if new dangerous files are detected.
We update our software constantly to protect against new and emerging ransomware strains.
Isolates potentially harmful files from the rest of your system to keep your computer safe.
We’ll scan for and remove the malware that’s putting your PC at risk, no matter where it’s hiding.
Alerts you immediately if unusual app behavior is detected that may indicate a threat.
If unusual app behavior is detected, you’ll see an immediate alert to block the threat.
Blocks malicious files and programs from opening, and alerts you if new dangerous files are detected.
We update our software constantly to protect against new and emerging ransomware strains.
Isolates potentially harmful files from the rest of your system to keep your computer safe.
Avast Free Antivirus is packed with powerful security features and built on top of an industry-leading antivirus threat-detection engine. Avast’s top-performing cybersecurity engine has been winning prestigious awards for years:
But don’t just take our word for it.
The UI for your software - amazing. Great work over the years. Can't say enough good things!
Thank you, Avast, for the excellent work you do. I run your antivirus software on both my Mac OS X and my Windows machines. You have the best products on the market, period.
I’ve been using Avast for over a year and have found it one of the best free software protection devices on market.
Ransomware can hold any device hostage, including Macs and mobile phones. Avast’s free antivirus software will help you protect against and remove ransomware from any device.
Avast Free Antivirus is a powerful anti-ransomware tool to keep your PC safe, or to remove ransomware from an infected system. Best of all? It’s absolutely free.
We’re not demanding. All you need is a PC with Windows 11, 10, 8.1, 8 or 7*, 1 GB RAM
and 2 GB of hard disk space. And that’s it.
* Both the 32- and 64-bit versions, excluding Starter and RT editions.
Windows 10 compatible
Get free threat protection for your iPhone with Avast Mobile Security
Avast
Mobile Security
Get free ransomware protection for PC with Avast Free Antivirus
Get free ransomware protection for Mac with Avast Security
Get free ransomware protection for Android with Avast Mobile Security
Avast
Mobile Security
2025
2025Get free threat protection for your iPhone with Avast Mobile Security
Free install
2025
2025Get free ransomware protection for PC with Avast Free Antivirus
Free download
2025
2025Get free ransomware protection for Mac with Avast Security
Free download
2025
2025Get free ransomware protection for Android with Avast Mobile Security
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