For people using the following versions of Windows, make sure you have the following patches installed on your machine:

 

 

 

 

 

 

Credit to:

PSA: Massive ransomware campaign (WCry) is currently being conducted. SMB v1 (MS17-010) is the primary attack surface. All desktop and server versions of Windows from Vista to 10 are affected. Make sure your machines are patched to avoid infection. from pcmasterrace