So I just built a new PC, put in my buddies Windows Vista 32Bit CD to just make sure everything worked properly and the computer functioned with all the new hardware I put into it. Now I recently bought windows 8.1 64bit, from online. I went to a Microsoft Store to because I ended up needing the CD of Windows 8.1 which they burned and gave to me. Now, Im getting an error saying I cannot instal 8.1 because it is a 64Bit and im running 32bit from Vista. I do not have the Vista CD, how can I cleanly install Windows 8.1 64 BIT?