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Symantec has disabled part of one of the world's largest networks of infected computers.
About 500,000 hijacked computers have been taken out of the 1.9 million strong ZeroAccess botnet, the security company said.
The zombie computers were used for advertising and online currency fraud and to infect other machines.500,000 ZeroAccess Botnet-Infected Computers Disabled - Implicated in Click Fraud [bbc.co.uk]
Yep, I agree, they aren't idiots, they are mostly either lazy or ignorant, often both.
They've all been warned not to open emails that don't come from people they don't know and especially don't open file attachments you weren't expecting yet they do it anyway. Idiots.