Reuters has shut down its instant messaging system after suffering an onslaught from a new Kelvir worm, the company confirmed Thursday. The London-based international media company decided to take its Reuters Messaging system completely offline after noticing the attack on its network earlier on Thursday, a Reuters representative said. The new variant attempted to spread by sending fake instant messages to people in contact lists on infected systems, a technique used by earlier Kelvir strains. The messages, crafted to look exactly like legitimate IM correspondence, attempted to lure people to a Web site where their computers would be infected with...