GOod Day, I had some dvd drive replaced with an SSD. I can install OSX on the main drive and SSD no problems whats so ever. But windows is been an nightmare. I installed WIndows on both SSD or HDD. When its boot a few times or restart, even apply update it always goes into repair mode or cannot find boot partition on black screen. I have to run repair. Please please help me out here. I tried my old Windows 8.1 purchased. Then I tried Windows 10 I just got from Microsoft store that came with USB Drive, and choose EFI Boot and installed it.Then after I got to the login screen to create user accounts it rebooted and when into repair mode. After which I did, then it does system restore to repair. Once at login screen again, after a few reboot goes into repair mode again. Already PRAM, NVRAM on my iMac. already latest firmware and updates in OS X.