How many computers have it?

It's unclear how widespread the "blackout" will be. According to a working group set up by security experts, more than 300,000 computers remained infected as of June 11, including 69,000 in the United States. Last week, 245,000 computers were said to be still infected with the so-called Alureon virus, according online security firm Deteque, including 45,355 machines in the United States.