Windows 7: Two OS HD's need to make one Slave

We needed to confirm the media first before proceeding. In tens of thousands of installation problems we've seen here the media is problem in about half. In your case I also moved on to give you other steps to try which continue to be ignored while you prattle on.

I've also given you multiple ways to wipe the HD with Diskpart Clean Command which you ignore and insist upon confusing with formatting. If you cannot get to the installer Command Line or slave the HD to another OS to run the command from an Elevated Command Prompt, then you can download and burn a DBAN or Partition Wizard bootable CD to boot it to wipe the HD, which will tell you if another disk can boot in the PC or not. If successful it will force the installer to boot itself on a wiped HD.

What was the result of resetting the CMOS, changing SATA controller setting to AHCI, checking for a newer BIOS update? All ignored.