I upgraded from xp to win 7 hp. After many years my win 7 is causing shut down. Something is corrupt. My product key number which shows under system info is two short in the amount of numbers and I no longer have the case or cd. I can't seem to get any information from windows if I registered my computer or software and really just need to download 7 again and reinstall it. Is their any other way to get my product number. I did buy the software. my product key is 4 didgets short
***Post moved by the moderator to the appropriate forum category. Subject edited to add clarity.***