Run a free spyware scan — powered by Avast's industry-leading antivirus detection — and eradicate advanced spyware and block malicious downloads before they can do any harm. It’s that simple.
Protect your PC from spyware, viruses, malware, ransomware, and other threats. All in real-time.
Clicking one button reveals vulnerabilities on your PC, including unsafe settings, suspicious add-ons, and out-of-date software — and helps you fix them.
Our software’s advanced machine-learning capabilities adapt to the newest threats and stop them cold before they reach your computer.
Join the 400+ million other Avast users who are protected from spyware, viruses, and home Wi-Fi threats.
We’ve packed the world’s largest threat-detection network and machine-learning malware protection into a single, lightweight malware scan and removal tool that won’t slow down your PC. And did we mention, it’s 100% free?
Avast One’s powerful anti-malware protection has been recognized by the industry’s top reviewers. PCMag noted Avast One’s “numerous excellent lab scores,” and found Avast One to be “a partner to keep you, your devices, and your data safe and happy” — two of many reasons why PCMag gave Avast One its 2021 Editors’ Choice award.
In their 5-star review, TechRadar praised Avast One for its malware protection and prevention strengths alike: “Avast One doesn't just do a good job of detecting malware: it detects and blocks access to malicious websites, reducing the chance you'll get infected in the first place.”
The top-ranked antivirus engine that powers Avast One has been earning prestigious awards for years:
AV-TEST: Top Product, AV Test Certified, 2022
PC Mag: Editors’ Choice, 2021
TechRadar: 5 stars, 2021
AV Comparatives: Top Rated Product Award, 2020
We think it’s okay to brag a bit when your personal digital security is at stake. To see more awards, take a stroll through our trophy room.
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.
That’s right, phones also need protection. Avast’s Android security software defends your phone from spyware, malicious apps, and other threats. Secure your Wi-Fi network and keep your data where it belongs — right in the palm of your hand.
Think your Mac might have caught something bad? Avast’s Mac antivirus software automatically detects and removes spyware from your Mac while defending against other types of malware like viruses and ransomware, too.
Avast One scans, finds, and removes spyware, blocks future spyware infections, and guards against viruses, ransomware, and other threats. And it doesn’t cost you a dime.
The most common signs of a spyware infection include:
Slow device performance
Frequent freezes or crashes
Unexpected changes to your icons, homepage, or browser
Unusually high background data usage if you’re on mobile
If you experience any of these issues, run a malware scan with a free antivirus.
Spyware is a particularly dangerous form of malware because it’s so invasive. It can track your activity including your keystrokes, steal your credit card numbers, uncover your passwords, and access other sorts of other personal information.
Like other devices, phones are susceptible to viruses and other malware. One recent notable example is Pegasus spyware, which can be secretly installed on phones and read text messages, eavesdrop on calls, harvest passwords, and even track the user’s physical location. Detect and remove threats with a malware removal tool, and protect your device with mobile security or dedicated iOS security.