This document discusses ransomware viruses like CryptoLocker and the need for regular data backups. It notes that ransomware infections grew 500% in 2013 and describes how the viruses work by encrypting files until a ransom is paid. While email filtering and security software help, they are not foolproof. The document argues that the only sure way to mitigate ransomware threats is through regular, versioned data backups that allow restoring files from before infection. Backups not only protect against ransomware but also other data loss causes, providing overall systems continuity for businesses.