Off late, the internet world has been hamstrung by a series of cyber attacks and the latest incursion that has crippled the cyber world is the Petya ransomware attack. This malicious software is spreading at an alarming rate using Eternal Blue, a hacking tool that exploited a bug in the Microsoft Windows. This was the same tool used by Wannacry ransomware that caused the recent strain.
Even major antivirus softwares have come up with updates to detect and protect the computers from such ransomwares. Updating the Windows atleast to the March 2017 patch would also help in protecting your computers from such ransomwares.