So I'm trying to install Windows 7 pro and I have tried 3 different pcs and I have made multiple windows pro installation discs then only thing that stays the same is my hdd and the cd tray, just cannot figure it out. It has to be the Hdd it it refurbished, but doesn't make any sense I can use it all I won't as storage so I just don't know I have been trying for about 40 hours now with no luck so if there is anything anyone can help with or do that would help tremendously......... THANK YOU.