Computer security technologists are racing to find ways to block ever-more complex computer worms and viruses that burrow into computers -- usually via e-mail -- and wreak havoc on network systems.

Similar to viruses such as Hybris and Happy99, the Gnutella worm infects a PC and then monitors a computer's network connection. Hybris and Happy99 watch for email addresses -- this worm looks for ...

Code Red, the big bad virus of 2001, is still hanging around in cyberspace, infecting machines here and there. Bottom line: Toss all unexpected attachments directly into the trash.

Where other, similar worms have come as part of e-mails posing as Microsoft security updates, for example, recipients of this one simply got an e-mail reading "hi" or "test : )" ...

The worm arrives in e-mail messages from a single sender, [email protected], and is stored in attached executable files with names such as Sample.pif, Untitled1.pif and Movie_0074.mpeg.pif, according ...

In the 1990s, for example, not only were several computer viruses named for AIDS, but computer security professionals used “safe sex” analogies to explain how to keep electronics virus-free.

The computer used by a person working with online sales, for example, might be disconnected only when the threat of an attack is virtually certain; the benefit she provides by continuing to work ...

Stuxnet is a Windows-based computer worm first described by security researchers in Belarus in June 2010. It was unusual in that it targeted industrial systems that use Siemens’ software.