Cryptolocker raises concern

CYPTOLOCKER is a type of Ransomware that restricts access to infected computers and requires victims to pay a ransom in order to rescue their computers from criminals who take them over. It's so sophisticated that one US police force was hit by the virus and forced to pay a ransom using a new virtual currency called bit coins. Pfishing emails --which look legitimate, with subject lines like "payroll or package delivery" are the usual method of delivery.