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18 Jun 2011  
marsmimar

Microsoft Community Contributor Award Recipient

Win 7 Pro 64-bit
 
 

According to MSDN retail subscriptions expire in one year and have to be renewed. This chart compares the various subscriptions. As far as product keys are concerned, this may have the answers you seek.

MSDN Subscriptions | Help with MSDN Subscriber Downloads Product Keys
My System SpecsSystem Spec