angry tapir writes: "Microsoft has seen a dramatic drop in the number of computers infected with Waledac, a piece of malicious software affiliated with a botnet that was once responsible for a massive amount of spam. In the second quarter of this year, the company cleaned only 29,816 computers infected with Waledac, down from 83,580 computers in the first quarter of the year. The drop in the number of infected machines shows the success of the legal action Microsoft took earlier in the year, according to the company."
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