Hard Drive not recognized Windows 8

My hard drive NTFS is attached and seen under Windows 8 Disk Management software, but is not accessible (or seen) under "Computer" or normal "File Explorer".

I attached a new hard drive, and the other "disappeared".

The one I need is listed as Disk 1, Basic, Online, MBR, 953866MB, ...
Location 1 (Channel 0, Target 1, Lun0)

And the new seen disk is Disk 3, Basic...
but Location 0 (Channel 1, Target 0, Lun0)

I think the BIOS might not be set right?  Or perhaps it's only visible on days beginning with the letter P...?? (lol)

Thanks
AFTerryAsked:
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Mohammed RahmanConnect With a Mentor Commented:
Right beside the Disk 1, do you see a rectangular box with either (black, dark blue, green) thick bar?

If yes, right click on it and click on "Change drive letter and paths"

Select a drive letter from the available letters and click OK. Also make sure that the disk show as Online. If it doesn't, right click on Disk 1 and click Online.

The drive should now appear in Windows File Explorer.

** This is not an issue with BIOS. You can ONLY enable or disable a drive via BIOS. If Disk Management is detecting your drive, it mean the drive is enabled in BIOS.

If you see (GPT Protective partition) in the rectangular box, right beside Disk 1, follow the procedure from link below.
http://blog.paulgu.com/windows/delete-gpt-protective-partition/
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AFTerryAuthor Commented:
It's not the always the complexity of the solution nor the time it takes to implement it that is so deserving of the $$$$$ - it is often simply knowing which "button to push"!!!

THANK YOU, thank you for KNOWING, and sharing that knowledge.
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