I have a laptop that I need to make a clean install on. The laptop came pre-installed with Windows 8 pro. After the 8.1 update came out, I obviously upgraded to 8.1. My question is, can I re-format the computer with 8.1 media and use the same key? Or do I have to format it with Windows 8 media for the key to be good, and then upgrade to 8.1?
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