>> but conficker can jump over protections.re reporting this story, we were stunned to learn that the wily worm had struck us, right here at cbs news. >> people were having problems with their blackberries, their log-ons. >> louis pelaez, a network engineer, says conficker is so aggressive, it took technicians here 24/7 over ten days to hunt down and quarantine the affected computers. >> do you actually know where it started? do you--can you pinpoint it? >> we really will probably never know exactly how it infected the network. we just know that, you know, once it hit, it began to propagate. >> cbs news has now contained the infection, but pelaez says conficker could still be hiding undetected somewhere within the network. did you think cbs was safe? was that in your head? "we're safe?" or did you think this could happen? >> "no, i pretty much thought that we were pretty solid. you try to secure a network, but there's no guarantee that somebody can't come up with something that will, you know, wreak havoc." >> since our story f