So i had problems with my previous cpu and ive decided to upgrade to a z77 extreme 4 mobo and an i5 3570k. I have an oem copy of windows 7 and im under the impression that i will have to rebuy windows.However, ive read that if i contact support they may be able to renew it for me. Also does that mean all my files will get cleared i cant get on my computer because of cpu problems so i cant back up everything and i also have an ssd with files on it.