Botnet master hits the kill switch, takes down 100,000 PCs
 

Botnets aren't just dangerous because they can steal massive amounts of personal data and launch denial-of-service attacks—they can also self-destruct, leaving the owners of affected machines in the dust. The controllers of one such botnet recently hit the kill switch for one reason or another, taking down some 100,000 infected computers with it.

http://arstechnica.com/security/news...100000-pcs.ars