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Protect your Windows 8.1 PC with Avast Free Antivirus

Your Windows 8.1 PC deserves an antivirus trusted by 435 million users worldwide.
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Essential antivirus protection for Windows 8.1
Avast Free Antivirus has been tested on Windows 8.1 by AV Comparatives, who found we offer 100% protection against zero-day malware attacks. That, combined with our growing suite of security features such as Avast SecureLine and Avast Passwords, will ensure that no threat will put you or your PC at risk.
Microsoft-approved security for Windows 8.1
Avast is one of Microsoft's official consumer security software providers – ensuring our place as one of the most beloved, trusted antiviruses on the net, used by 400 million users around the globe.

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