The problem is that your other HD - actually disk 0 in the screenshot you posted - has no drive letter assigned to it. This is easily fixed by rightclicking on that partition and adding a drive letter.
You do seem to have a different issue though - the partition that's missing a drive letter contains another installed Windows 7 system. Were you meaning to delete that installation and clean-install 7 from scratch?
You are booting from the 1tb now.
Which drive would like to boot from?
I would like to booth from disk1 and use disk 0 as clean hard dive.
(like to format it).
Thank you very much for your helps
1) Physically disconnect 1tb the HD.
Make the Windows 7 HD, disk0 & first HD boot in BIOS, also connect 1tb the HD to the first Sata port on the MOBO.
Leave the 150gb HD Drive disconnect
You may need to
Do a Strartup Repair:
Startup Repair
Note: You may need to do startup repair 3 to 4 times.
Startup Repair - Run 3 Separate Times
When Windows is booting OK.
2)Reconnect the 150gb HD Drive, delete & create new.
Partition or Volume - Delete
Partition or Volume - Create New
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