i downloaded and installed the Windows 8.1 Core Single Language (PT-BR) from this forum and after used KMSpico to activate the problem is when i try to upgrade to pro version i cant keep saying: "You cannot add features in windows 8" i wanna upgrade to PRO if possible WMC too What i tried: uninstall KMSpico and after used a VLK key but dosent allow me to upgrade Uninstall KMSpico and after used a Retail key but none of them i tried ( around 10 ) let me activate my windows to upgrade so what i'm supposed to do? a clean install? any tips?