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#11
Did you move the SATA cable from the HDD that had the original Windows install to another port when you added the second HDD to the PC?
Please remove the DVD from the DVD-Rom.
Is the "Disk 0" listed as the first boot device in the PC BIOS, if you changed the SATA cable around it may no longer be the first boot device in the BIOS and that may be causing the issue.