Virus alert!!! There is a malicious computer program or virus called Locky that will lock or encrypt the important files on your computer, making them unreadable or inaccessible. It will then demand a money ransom to have the files unlocked or decrypted, which there is no guarantee that this will happen after sending the ransom.
Article Link: http://www.onlinethreatalerts.com/article/2016/11/28/locky-a-dangerous-virus-or-malware-that-locks-your-files-for-ransom/