Number one you must be logged into Windows Live or your link may not work
NOT WORKING NOW, BUT YOU CAN TRY
https://www.microsoft.com/betaexperience/productkeys/win7-64/enus/default.aspx
https://www.microsoft.com/betaexperience/productkeys/win7-32/enus/default.aspx
NOT WORKING NOW, BUT YOU CAN TRY
https://www.microsoft.com/betaexperience/productkeys/win7-64/enus/default.aspx
https://www.microsoft.com/betaexperience/productkeys/win7-32/enus/default.aspx