Nitro - we're moving on up, into the Cloud

The new Nitro Update for Avast antivirus is our most lightweight software yet. From now on, we'll be running a significant portion of our analysis in the Cloud - and not on your system where it can slow you down.

Antivirus with the lowest impact on PC performance

Introducing CyberCapture

Stay one step ahead of evolving cyber threats. This proprietary cutting-edge technology captures unknown files and sends them to the Avast Threat Labs for real-time analysis to keep you safe.

Security for your Internet of Things

Your home is your castle. So why invite hackers in to stay? The Avast Nitro Update delivers a new level of router threat detection so you can protect the devices around your home.

Find Out More Here

Plenty of features. No extra weight.

The Avast Nitro Update is designed to have less drag on your system so you can stay fast and productive, and safe at the same time.

Antivirus and anti-malware

Protect yourself against threats that don’t even exist yet.


Captures emerging threats in real-time through the Avast Threat Labs.

Home Network Security

Stop hackers getting hold of your home network – and anything on it.

Browser Cleanup

Who needs unwanted toolbars and extensions slowing down their PC?

NEWSafeZone Browser

Browse, bank, or shop — with extra protection from hackers and online ads.

Smart Scan

Give your PC the ultimate all-in-one scan, all in one go.

Choose your Nitro-powered protection

Avast Free Antivirus Avast Pro Antivirus Avast Internet Security Avast Premier
Free Antivirus Essential
Pro Antivirus Expert
Internet Security Advanced
Premier Complete
FREE DOWNLOAD Download Download

Free 30-day trial


Free 30-day trial

Stop anything nasty Detect viruses, malware and more, plus strengthen your home network. yes yes yes yes
NEWCapture emerging threats Real-time analysis of unknown files, so viruses can’t take you by surprise. yes yes yes yes
Reclaim your browser Get rid of unwanted extensions and hackers making money off your searches. yes yes yes yes
Forget your passwords Almost. Log in anywhere with just one. We’ll make it unbreakable. yes yes yes yes
Spot fakes Make sure the banking site you’re visiting is the one you think it is.   yes yes yes
Shop till you drop Not till someone steals your details.   yes yes yes
Shield your privacy Stop anyone and everyone from getting to your computer.     yes yes
Avoid spam at all costs* Keep your inbox clean, lean, and organized.     yes yes
Beat hackers – automatically Update your software without even thinking about it.       yes
Shred before you sell Or lend or repair. Deleting doesn’t get rid of files for good.       yes
* Anti-spam is available as a separate, free download. FREE DOWNLOAD Download Download

Free 30-day trial


Free 30-day trial


Compatible with Windows 10, 8.1, 8, 7, Vista, XP SP3

The world’s number one security

people protected worldwide

400 M

The most downloaded software

The best-selling security software

Antivirus with the lowest impact on PC performance

Official Download Partner

Chrome browser logo

Avast recommends using
the FREE Chrome™ internet browser.