BBC: "A computer virus called Sircam is using some clever
tricks to spread itself and potentially sensitive files
around the net.
The virus strikes PCs running Windows, plunders
address books for new places to send itself and steals
random documents from a machine's hard disk.
It also attempts to disguise itself by changing the main
text of the message and choosing a new subject line
every time it travels.
The virus, more properly known as a worm, was first
detected in mid-July but has slowly been gathering