Usually you move the drive into a spare bay, hook up a power and data cable and it's done.
The drive letter is assigned as Windows boot and there are tutorials to change but you can NEVER change it to C. The OS is incorrect for your new machine.
Recap. Install, easy. Use it as drive C, nope.
I have a 1TB HD that is the C: drive on my old computer. I would like to move it to a new computer as a 2nd drive. I want to keep all the data on the drive, not reformat. I'm not sure how to hook it up. I assume I set the jumper on the drive as a slave. How do I configure it with a different drive letter? Also then how do I change the 2nd HD on the old computer, which contains an image of the operating system, to be the new C: boot drive. Can someone help me.
Would appreciate it.