WannaCry Ransomware and its variants can be prevented by Disabling this feature

Follow the below steps for Windows 10 :-

1) Type "Turn Windows features" into the Start Menu 
2) Click the entry for "Turn Windows features on or off"
3) Scroll down to "SMB 1.0/CIFS File Sharing Support" and uncheck the box. 

You will then need to restart your PC for changes to take effect.

REMEMBER keep your windows and drivers updated !!