If it is write protected Here is the solution:
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Open a Command prompt by clicking Start, typing command , and clicking Command Prompt.
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Type diskpart and press Enter.
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Type list volume and press Enter.
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Type select volume # , where # is the number of the drive that’s giving you the “write-protected” error. In my case, I ended up typing select volume 3.
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Type attributes disk clear readonly and press Enter.
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Type exit and press Enter.
Source: http://www.pcworld.com/article/245174/restore_access_to_a_write_protected_hard_drive.html
If it is freeze security lock then you need to get it replaced.