People in Adelaide have fallen for these emails which purportedly come from AGL & Telstra (they do not ) .
By clicking on the links you will be infected with Cryptolocker.
I have been swamped with calls since these emails have started to arrive on computers.
If you get any of these emails just delete them as clicking the links will result in your drives being encrypted and a ransom asked for the encryption key.
More information on Cryptolocker can be found here , including how to prevent it , but remember to have an offline backup.