The Petya.A ransomware is one of the worst computer infections you will never want to face in your entire life. It is listed as the top file-encryption malware that penetrates into Windows PCs silently. The worst part of the story is that you can’t even prevent its intrusion! If you have access to the Internet it can attack your system. Our malware analysis team found that Petya Encryption Infection is packed on third party freeware and spam email attachments. How does it attack your particular PC? Please continue reading this guide.