Protect your privacy when you’re online
Stop snoops from seeing your IP Address and online activities with Avast SecureLine VPN.
Free antivirus
Free antivirus
Your first step to online freedom
We believe everyone has the right to be safe online, which is why we offer our award-winning free antivirus to millions of people around the world.
Award-winning antivirus
Easy to install, effortless to use
435+ million users worldwide
We have 30+ years of experience
Avast will help keep you safe online from over one billion threats each month
Over 400 million users worldwide trust Avast with their private information
Light, powerful protection that won’t slow you down
Protect more of what you love
Avast One premium packages offer you more tools to optimize your digital life, such as unlimited VPN and password protection. Even better, they allow you to protect multiple devices for you and your household.
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For 30 years, we’ve fought for digital freedom for all
About AvastGet security, privacy, and performance tips, straight from the experts
What Is a Computer Virus and How Does It Work?
A computer virus is designed to infect programs & files with malicious code, changing how a computer operates and spreading across systems.
What is a VPN & How Does it Work?
What is a VPN? What does it do? How does it work? And how can you use a VPN? Learn all about a VPN's definition and uses in our guide.
How to Increase Your Internet Speed Right Now
Wondering why your internet speed is slow? Learn how to improve your internet connection right now, whether you're on Wi-Fi or Ethernet.
What Is Hacking?
We all have some concept of hacking - but do you really know what it is? Read our full hacking definition here.
How to Block Websites on Google Chrome
Learn how to block websites on Google Chrome to stop you or anyone else from accessing them from your computer or phone.
TCP vs UDP: What’s the Difference and Which Protocol Is Better?
TCP drives reliable data transfers while UDP prioritizes speed and efficiency. Read more to understand the differences between TCP vs UDP.
How to Clean Your Computer Screen Without Damaging It
Cleaning your computer screen can be a delicate process. Follow our simple guide to learn how to get a clean screen and laptop monitor.
How to Find Out an Unknown Caller’s Number
Receiving calls from an unknown number can be frustrating. Learn how to find out who is calling you from an unknown number here.
How to Fix the Blue Screen Of Death (BSOD) on Windows 10 and 11
Seeing the blue screen of death on your Windows computer can be devastating. Understand the causes and learn how to fix the BSOD.
