2 days ago windows gave me a message that me legitimately bought windows 7 home premium operating system is not genuine and i have to enter the product key which i don't have because windows 7 came pre-installed in my system and i can't find any product key but i hav bought windows 8 a couple of months ago and i am ready to upgrade. and i am a software noob so please help me out in this question: if upgrading my windows 7 to windows 8 will it format my hard drive or will i lose all my games and stuff?