I bought a new PC and the tech shop installed a cracked version of Win 10 in it. They said I can just put in my legal product key and it will work. The thing is, when I try to change my product key, Microsoft says invalid key. I tried two different keys of Win 10 Pro, which is the OS they put in my PC. Settings>Update and Security>Activations shows " Windows is activated using your organization's activation service." This cracked version has updates disabled. Is there any way I can re-activate Windows using one of the keys I purchased online? I have put in some programs in the PC already so would like to keep them, and not format C: and have to install Windows+ the programs all over again. Could someone please help? I dearly hope I am not about to get banned as I am trying to remove the crack and use my legal Windows product key.