I buy a laptop "dell" comes with Windows installation CD (home edition with SP2), i did formating to the hard disk and install Windows from this CD, it did not ask me any serial number or product key, but it have some simple problems so i repair it using the same installation CD. and enter the product key on lable on my laptop when windows ask that through installation, and windows accept this key
now he ask me the activation code within only 30 days, so i follow the steps of activation and chose register and activatie windows at the same time.
after that he ask me the product key, in fact "New Key", i enter the same number code on the lable, be he refuse that and ask the key or "new key" what can i do to solve this problem?