Ransomware Patch (march 2017) updates
We see that you would like to know how you can get the update for Ransomware Patch dated March 2017. A ransomware threat does not normally spread so rapidly. Your computer is secured as long as your Windows 7 and Windows 10 operating systems are updated. If you want to download the update, you can check this link.
So everyone out there goes fix it, Update your windows to the latest version and avoid the ransomware attack.
For more information about the ransomware attacks, you can check this link. Keeping your windows up to date is the only way to avoid any ransomware attack.
Source : MicroSoft