I am trying to rebuild an old computer I just got and it has issues with vista. I have a copy of windows 8 pro oem but I dont want to burn my key if this computer is junk. And you cant laod 8 with out the key on install without a key here is my question. If I install 8 and use the key but dont activate it online is my key burned? I really dont want to waste the key ona junk computer. Thanks