Windows only starts on my new drive when I have my old drive installed with it.

[mikebaldwin]

 My new drive has windows installed on it, and I installed all the motherboard drivers on the new drive, but when I remove the old drive, (which BTW has sector problems that scan disk always tries to fix), the computer won't start windows. What makes it even more aggravating is that windows won't start from the old drive, but without it, windows on the second drive doesn't start. Any ideas???

[Geek-9pm]

Welcome!
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The problem you describe is neither frequent or rare. It happens when a second drive ins in stalled into a system.

This problem can happen when one drive is PATA and the other is SATA. But you post does not provide this detail.

Before offering a solution, some more information is needed, both the hardware and the software.  Details matter.

[Computer_Commando]

Boot.ini file needs to be repaired:  http://www.computerhope.com/issues/ch000648.htm

[Linux711]

The reason is because sometimes windows puts the boot loader on a different drive from the system files.