Keep your Windows 11, 10, 8, or 7 computer safer from viruses and other malware. Boost your home Wi-Fi security. Help stop ransomware attacks. Download today and join millions of others. Get Avast One with Free Antivirus for Windows.
Top–Rated Product 2025
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Top–Rated Product 2025
Top Product
We live more of our lives online every day. At the same time, threats to our security and privacy are growing more sophisticated. That’s why we’ve included advanced tools with our powerful antivirus software for Windows.
If you suspect an online message or offer seems off, ask our Avast Assistant if it’s a scam. It gives you easy-to-read guidance fast. Our smart AI-powered Web Guard can also help you block hidden scams online, plus dangerous downloads.
Here’s why Avast is one of the most trusted, reliable, and experienced cybersecurity experts in the world.
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.
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.
We can help protect you against advanced online threats, backed by one of the world’s largest consumer Cyber Safety networks. And we’ve been proud winners of different awards over the years. Check out some of our more recent ones below. The award-winning protection from Avast Free Antivirus is also available in the Avast One app.
2025
AV-Comparatives
Anti-Phishing Comparative Test
2025
AV Test
Home User Protection Test
2025
SE Labs
Security Evaluation Test: Home Anti-Malware
2025
AV-Comparatives
Anti-Phishing Comparative Test
2025
AV Test
Home User Protection Test
2025
SE Labs
Security Evaluation Test: Home Anti-Malware
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 PC or laptop. And it’s free, so give it a try.
If you’re planning on upgrading from older versions of Windows, such as 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.
Sometimes you just need an individual tool for an individual purpose. Learn more about some of our privacy tools, below.
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