Windows 7, Configuring or Exam 70-680 is a exam for for creating specific Technologies specialization in the given field viz., Windows 7, Configuring.
Windows 7- 32 bit to Windows 8- 64 bit. – Microsoft Community
I found informations that I can install Windows 7 on up to 3 computers with the same serial number.
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Download, install, you will see the product key number to the right of Serial Number.