One of our users computer automatically upgraded from windows 8 pro to 8.1 and keeps asking for activation code. It is not accepting the code that we had for 8 pro. I called activation phone help, and they transferred me to tech support, they transferred me 4 more times, and finally told me to put a request in online and i would be charged for it. So I really need to get back to Windows 8. Is there a way? Thank you.