Computers on a home desk
Do you know if your PC has been taken over by cyber-criminals?
Criminals controlling millions of personal computers are threatening the internet's future, experts have warned.

Up to a quarter of computers on the net may be used by cyber criminals in so-called botnets, said Vint Cerf, one of the fathers of the internet.

Technology writer John Markoff said: "It's as bad as you can imagine, it puts the whole internet at risk."

full story: http://news.bbc.co.uk/1/hi/business/6298641.stm