"According to the article, Microsoft investigators "were amazed
recently to find a botnet that turned on the Microsoft Windows
Update feature after taking over a computer, to defend its host
from an invasion of competing infections."
"Good lord. What's more, botnets have evolved quickly to make
detection more difficult, recently using "fast-flux," a technique
that generates a rapidly changing set of Internet addresses to make
the botnet more difficult to locate and disrupt."