Remove Vista Hard Disk

I have a system that used to boot Vista. I added a hard disk and put Windows 7 on the new disk. Now I can choose with OS I want during boot.

Today I disconnected the Vista hard disk to see what happened. I cannot get Windows 7 to boot without the Vista drive hooked up. Is there a way to transfer the boot manager to my new hard disk? Both disks are SATA (if it matters).


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