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Clean machines from Mydoom virus.
Worm searches for e-mail addresses in the infected PC's domain--targeting all users from a specific company or ISP.
In 2004, stories that mattered most to readers covered viruses, Net surveillance and unexpected uses of everyday technology.
Timing of viruses that exploit a flaw in IE could be sign that creators are trying to unsettle Microsoft.
A second MyDoom offshoot is taking advantage of an unpatched security hole in Microsoft's Web browser to spread.
Antivirus firms tell PC users to turn on firewalls--Microsoft has yet to patch the Internet Explorer vulnerability.
In worm's latest version, authors ridicule rival worm Netsky and promise to attack Symantec, McAfee and others.
"It's like they wanted to help us, which is weird," one security expert says of the latest bizarre twist in the worm's development.
Four minor copies of the program surface, which may indicate that a more lethal MyDoom is on the way, according to some experts.
But the antivirus community wrinkles its nose at the notion of a worm as curriculum vitae.
New variant of the worm represents a troubling trend that results in PCs being "owned by the virus writers," one expert says.