RANSOMWARE UTILITIES I suggest you download these and burn them to a CD for future use.
Protection: Malwarebytes Anti-Ransomware (Free) http://www.bleepingcomputer.com/download/malwarebytes-anti-ransomware/
Virus Checker: Avast! Free  (or AVG Free) avast!    
Recovery Help Analysis after attack to assist in recovery. https://www.nomoreransom.org/
Malware scanner: MalwareBytes Free MalwareBytes
Recovery: Farbar Recovery Scan Tool (Free but donation option) www.geekstogo.com
Other useful safe links... downloads.cnet.com