Error code 52 , WIN 7

It’s a 3TB disk ,

P/N:WDBACW0030HBK-01

S/N:[Edited]

The problem is  :

Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)

What can I do with this , the files inside are important

Hi, that sound like a problem with windows, check if the link below helps.

http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/windows-cannot-verify-the-digital-signature-for/c3fa9bd1-b731-4ead-ab37-ac04d2980cd9