Ransomware threats

Hi there
Been using Norton,for along time now,really pleased with software etc. I have a couple of questions I would like to ask
I check back on a regualr basis for the updates,but nothing tell me what has been updated to my Norton 360
The other thing more worrying,is the massive ransomware attack,last week,as mentioned by another forum member.
I have a Windows 7 64bit PC,and was wondering what kind of things are, or have been done to make my operating system, more  secure?
I am carefull to back up my files,and always check Windows for updates too