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Win 7 Compatibility List for IT Pros
Not a bad spreadsheet to have on hand.
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=890e522e-e39e-4278-aebc-186f81e29173
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=890e522e-e39e-4278-aebc-186f81e29173