Original sentence: Cataclysm is an intelligent virus, it targets the most important files first, leaving the most insignificant files for last.It is a very deadly virus, and to try and use the amount of time before your system crashes to save any important files is futile - they will be infected and already beginning to disintegrate.The email is untraceable, as it comes from an anonymous computer with seemingly no IP address.The virus is transmitted to your computer terminal automatically, sending you a no-response email which warns you that your computer has been infected and will crash in a set amount of time.There is also a computer virus called Cataclysm, which is of unknown origins.When your computer has been wiped clean by Cataclysm, it switches itself off forever.You can't turn it back on after that, and no computer techinichian will be able to detect the virus, as it removes all traces of itself from your computer before it shuts down