Almost 1.5 million Windows customers downloaded a cleanup tool for the Sasser Internet worm in the first two days after Microsoft Corp. began offering the tool on Sunday, according to a Microsoft spokeswoman. The number of downloads is one indication of the number of Windows computers infected with Sasser and it is bigger than most estimates from computer security companies. Still, the total number of infected Windows systems could be even higher, especially when infections on computer networks are taken into account, the spokeswoman said.
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