All of you using Windows XP or earlier are vulnerable.

On Sunday, MalwareTech was one of many security experts warning that a less-vulnerable version of the malware is likely to be released. On Twitter, he urged users to immediately install a security patch for older versions of Microsoft’s Windows, including Windows XP. (The attack did not target Windows 10.)

https://www.nytimes.com/2017/05/14/w...nday.html?_r=0