Detailed text transcripts for TV channel - MSNBC - 20170515:15:21:00
The united states, but american computers along with the rest of the world could still be at risk. the big key here is whether or not your computers or computer networks have been updated with the latest security patches from microsoft. chris? >> meantime, a researcher who is believed to have stopped the attack over the weekend is talking about how he did it. what do we know? >> reporter: yeah, it's a little bit technical when you get into the weeds about how exactly he activated this kill-switch. but he's a 22-year-old cyber security researcher. he says he first noticed the attack friday morn...