This forum is closed. Thank you for your contributions.
The Product Key should on a COA sticker on the machine's case - see here...
http://windows.microsoft.com/en-us/windows/where-find-windows-product-key#where-find-windows-product-key=windows-7
http://windows.microsoft.com/tr-tr/windows/where-find-windows-product-key#where-find-windows-product-key=windows-7