It would help for you to ID the mobo, BIOS ver., HDD & Win ver.
What controller are you using for the HDD. I have two on my mobo the native Intel controller and a secondary Marvell controller. My BIOS ignores the Marvell controller unless I change the setting.
How old is the HDD? SATA, PATA or SCSI?
You need to give more info to get decent help.