I wrote about the CryptoLocker attack on Windows computers several months ago. However, the problem continues and the creators of CryptoLocker have changed their software several times since then in order to evade the various anti-CryptoLocker and anti-virus programs. The information I wrote in December was accurate at the time but is now becoming out-of-date. Today, a newsletter reader told me about a great online CryptoLocker Ransomware Information Guide and FAQ by Lawrence Abrams, available at http://www.bleepingcomputer.com/virus-removal/cryptolocker-ransomware-information.
CryptoLocker is a ransomware program that was released around the beginning of September 2013 that targets all versions of Windows including Windows XP, Windows Vista, Windows 7, and Windows 8. This ransomware will encrypt many files on your Windows computer and then display a screen demanding payment to unlock your files. That is why it is called "ransomware" as it demands a ransom to return to you what is rightfully yours. Unfortunately, there is no known method of unlocking your files without paying the ransom.