i know how the Ms giving you keys goes.
When i worked for Vizualogic and built the VMOD (VMOD in-car computer and media management server || Incorporating your home life into your mobile life ||) Ms was throwing os's and key as us like crazy to get us to use Ms instead of Linux. i have a copy of vista basic, home and ultimate, all never used keys. we ended up going with Xp home and for 45$ a copy that kept out bottom line lower and still did what we needed it to.

AMD and Intel were doing the same, throwing CPU's at us. i worked with the good ol boys at Intell and they built us a ULV celleron with 1Mb cache. AMD's counter part never passed the heat stress test. both at 1Ghz.

but i no longer work there and would like to have a copy of win7 w/legal key.