Avast One Free Antivirus

Protect your Windows PC with free antivirus software trusted by over 400 million users worldwide. Avast One Free Antivirus delivers enterprise-grade security in a simple, lightweight package that runs silently in the background, so you can focus on what matters while staying safe from viruses, malware, and online threats.

Quick installation and instant protection take just minutes. The moment you launch the app, it scans your PC for security vulnerabilities and performance issues, then begins real-time scanning of all unknown files before they can harm your system. You'll enjoy continuous, intelligent threat detection powered by state-of-the-art technology developed by the Czech security experts at Avast Software since 1991.

Stay safe from online fraud with enhanced scam protection. Scam Guardian combines Web Guard and the Avast Assistant to block malicious websites automatically as you browse. Web Guard detects and neutralizes dangerous sites in real time, while the AI-powered Avast Assistant analyzes suspicious messages, ads, and links you share with it—providing clear, actionable answers to help you recognize threats. This dual-layer approach keeps you protected from phishing, fake downloads, and social engineering attacks that target unsuspecting users daily.

Multiple security shields work around the clock. File Shield scans every downloaded file before execution, while Behavior Shield monitors processes for anomalous activity. Cybercapture automatically sends suspicious files to the cloud for advanced analysis, ensuring emerging threats are caught before they spread. Together, these six layers of built-in security create a comprehensive defense system.

Boost your PC's performance alongside security. The integrated performance enhancer removes unnecessary background processes and junk files that slow your system down, while also identifying outdated hardware drivers. One click launches the optimization—results arrive in seconds.

Manage all your devices from one place. The new modular design unifies security, privacy, performance, and identity protection in a single dashboard. Activate only the features you need, add paid modules as requirements change, and extend the same protection across your computer and smartphone under one account. A 60-day free VPN trial adds an extra privacy layer for public Wi-Fi and banking transactions.

Download Avast One Free Antivirus today and enjoy the peace of mind that comes from invisible, intelligent protection. Once installed, it works quietly in the background, handling threats automatically so you never have to think about security again.