please watch this video.
Britec shows how to remove it .

http://www.youtube.com/watch?v=FoNTXTyly-s

useful links below.
http://www.bleepingcomputer.com/virus-removal/cryptolocker-ransomware-information
http://www.foolishit.com/vb6-projects/cryptoprevent/
http://briteccomputers.co.uk/

Hope this helps you.