My HDD is found in my bios, and my windows 7 dvd seems clean. I've tried 4/8 sata ports on my mother board with no luck. I'm going to try another down load an burn today which will hopefully be more successful. This is a clean install by the way. Has anyone else had this kind of trouble. I'm using a gigabyte 790x MB, and a WD Black Caviar 640.