Hi,
This problem occurs due to an encryption failure, since you are facing this issue , I'd suggest you perform the following in the order of appearance and check if the issue persists.
Method 1:
a. Open a command prompt on your computer (Click Start, type "cmd" in the search box)
b. Type: manage-bde -status <drive letter> eg. manage-bde -status e:
This should let you verify the drive is unlocked and encrypted
c. Now type "manage-bde -off <drive letter>" eg manage-bde -off f:
This tells Windows to turn off encryption on that drive and decrypt it.
Be patient, decryption time can take a very long time, 12hours per 1.5Tb
Method 2:
Use the BitLocker Repair Tool to Recover a Drive
http://technet.microsoft.com/en-us/library/ee523219%28WS.10%29.aspx
Hope above information can help you.
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