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Microsoft will be offering anyone who's "unsure" about whether they've got dodgy software the chance to have it checked out by Microsoft, with the promise that if it does turn out to be counterfeit, they'll replace it.
The deal only covers Windows XP, and only five copies per person can be swapped. It's all free, besides the initial postage and packing. The offer only applies to pre-installed home or professional Windows XP bought before Nov. 1.