Martin Brinkmann has updated the ghacks.net Security overview, to 23 May 2017.
As well as reviewing named programs that act to prevent ransomware
A handy table compares the various paid and free software options - 13 all up.
(located halfway down page)
Decryption is also discussed, should you have the misfortune to not prevent an infection.
List of 62 different types of ransomware
https://www.askwoody.com/2017/anti-r...erview-update/