Lennox IT: Derby Business IT Support recommendation:
There are a number of new CryptoLocker clones emerging that can be prevented by installing CryptoPrevent. The malicious programs encrypt files on Windows computers and demanded a substantial fee before handing over the key to the scrambled files.
CryptoPrevent is a tiny utility to lock down any Windows OS (XP, Vista, 7, 8, 8.1, and 10) to prevent infection by the Cryptolocker malware or ‘ransomware’, which encrypts personal files and then offers decryption for a paid ransom.
Incidentally, due to the way that CryptoPrevent works, it actually protects against a wide variety of malware, not just Cryptolocker!