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HP Smart app mysteriously appears on non-HP Windows PCs | Microsoft is investigating
(www.techspot.com)
This is a most excellent place for technology news and articles.
There's this song from Lazy Town. It goes something like "yarr harr fiddle dee dee".
Either that or got a key off an admin (school, work, etc.)
There's also a chance it was bought through less legitimate means.
In any case, it is harder to obtain than even the regular Enterprise version, but not impossible.
E: oh I completely misread the question. To obtain it, I believe it can be obtained via UUPdump or something like that directly off of MS.