Quoting Avast.com

Trusted by over 435 million users around the world, Avast uses advanced machine learning techniques to protect against ransomware attacks.Avast Mobile Security & Antivirus in detail Antivirus Engine: Automatically scan for viruses and other kinds of malware, including spyware, Trojans, and more.Avast Free Antivirus is our essential security software for stopping malware, spyware, and ransomware without slowing down your PC.
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