"The worm turns out to be highly prevalent," he said, "and will probably be around forever, infecting other machines."

This can lead to viruses accidentally infecting machines as they are being prepared for the customer.

But, you know, they're still out there trying to infect machines.

This presumes that the botnets are even using 0-day flaws to infect machines.

They're still out there, scanning the 'Net, trying to infect machines.

It relied on a Java exploit to infect machines.

One is to stay protected, the other to infect virtual machines with malware and then try to clean them later.

It was this technology, as D. Larson suggests, where is it just sitting there infecting other machines, updating itself, and staying alive?

In addition, the worm infects other machines on the network, hitting even people who haven't recently used their E-mail.

Worms normally move around and infect other machines through computer networks.