My present os is Windows 8.1 pro/wmc. My first os is windows 7 64 bit. Then upgrade my os with windows 8 and free upgrade to wmc. Then upgrade to windows 8.1 using microsoft store. For some problem I want to clean install my os. Is it possible to install Windows 8.1/wmc directly without install first windows 7 then upgrade to windows 8 then 8.1? My activation information is backup using "Advanced Tokens Manager".