How can I change from windows 10 home to pro without buying a new key? I have windows 8 pro key and the media creation tool installed the wrong version. It installed home instwad of pro. Dont feel like reinstalling windows 10 after I just set it up. Did not realizer this until I looked at the activation. Would the insdied build 10565 let me change my product key to my windows 8.1 pro key?