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Microsoft recently released, then withdrew a piece of software called Windows 7 download tool. Originally released under GPLv2, it was withdrawn as some of the code included had licensing problems, and as such could not be released under GPLv2.
Having fixed this problem, they have now re-released it, as free (as in freedom and beer), open source software, under the terms of GPLv2. The fixed tool is now available at Microsoft’s CodePlex open-source repository.