My OEM hard drive died on me, so I had to replace it with a new one. I reinstalled windows and typed in the Windows product key on the computer case, but it gives me an error that it is not the correct key. Windows installed correctly and is running, but every time I shut down and log back in, it reminds me that the product key is not valid. I've verified that it is the correct number. What can I do to correct this issue?
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