I've seen a lot of false information around the web about product key changes in the latest build of Windows Vista (5270). Many websites and blogs were reporting that activation or installation could not be completed with the MSDN keys previously issued for other CTP builds. Supposedly, the product activation system was overhauled for this latest CTP release. That may very well be true, but I still used the key labeled for build 5219 in my MSDN account, and 5270 accepted it just fine. So there.
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