Ransomware is a malicious program that will encrypt your data.Ransomware is not something that every user has heard, and if you have just encountered it now, you will find out how harmful it can be first hand.When files are encrypted using a powerful encryption algorithm, you will not be able to open them, as they will be locked.Since decryption of data is not always possible, not to mention the efforts it takes to get everything back to normal, encoding malware files is considered one of the most dangerous malware out there. More info @ ransomware threats