Where if my Product Key if I want to re-install?

tengeezer said:

Thanks, but it still doesn't answer my question:

Does a format of a drive remove the license?

No, because the license is stored on Microsoft activation servers. When you move Windows from one computer to another, the license for the old computer will still be stored on Microsoft activation servers even after you format the old computer's hard drive. When you enter the product key to activate the new computer, you might get a response that says the product key is in use on another computer. In that situation you will have to call Microsoft for activation and tell the computer voice that you have that copy of Windows installed on only 1 computer, then you will get the activation code in return.

bobkn said:

There is no explicit de-activation of Windows on the old machine.

You may have to activate the installation on the new PC by telephone.

Just like bobkn said...