I pulled Windows 7 HD . Put in a different HD and installed Mint on 2nd PC. Mint(18) got it all working. I then added the windows HD back in. Booted to Mint. I went to terminal and typed sudo update-grub.
now at start up I have a menu of Mint and windows 7. The dual boot works fine.
Minor problem..... I do not like the looks of the grub menu. white text on black background. Can I change how this looks?
thinking of adding 3rd HD. eather Prime OS or Android 12