Question SSD Won't Boot into Windows 10 Without My Old HDD

[Mr_Kreg]

Alrighty I have a doozy here for you guys, My old hard drive has windows 7 on it and when I decided to upgrade to an ssd I figured I'd install windows 10 on it since it'd be faster, I decided to keep my old hard drive in for extra storage but it still has windows 7 on it the side effect of this being that when I boot up my computer it asks if I want to boot into windows 7 on the HDD or Windows 10 on the SSD. Fast forward to today never had an issue with booting, I decided to clone my HDD onto a bigger one so I could have more storage, after cloning I put everything back together and the computer is telling me I don't have a proper boot device, so I pop my old hdd in and go to drive manager on windows 7 and I see that the ssd isn't the active partition, so I make it active , take out the old hdd put in the new one and try to boot again, only to find a message saying it can't find an OS on my SSD which is ludicrous because when I boot into windows 10 it's on the SSD, so im trying to figure out why my SSD and my HDD have this weird symbiotic relationship where to boot into my SSD I need to use my old HDD as the boot drive. I'm stumped.

 

[USAFRet]

This is the result of leaving the old drive in while you instlled Win 10 on the SSD.
It has added the Win 10 boot info into the same boot partition as the original Win 7 on the HDD. And why it gives you the choice when starting up.

 

[Lutfij]

Your first mistake was to clone the drive. You should've left it as is and forgone with Windows 7 now that you're settled into Windows 10. You might want to pass on an image of what you see in Disk Management. I've had some instances where the additional partitions necessary for Windows 10 during installation were created on the HDD.

I'd ask you to install Windows 7 on the new drive if you intend to keep a dual booting system.

 

[USAFRet]

Possible fix:
Power OFF
Remove ALL drives except the SSD with Win 10
Boot up from your Win 10 USB
Run the Repair function.

This may fix the issue.