How to unlock BitLocker under Windows7?

Win7 function is too powerful, sometimes accidentally, it will be troublesome, you say it? Let us take BitLocker to say things ——
Windows7, in order to protect data, BitLocker on E disk encryption. However, after reinstalling the system, the E disk cannot be accessed. Double-click the E drive and no password input window pops up. Right click and select “unlock the drive” nothing happens. What should I do?

In addition to reinstalling the system, when removing a hard disk containing BitLocker drive encryption or moving the hard disk to another computer, the password input window may not be popped up and data cannot be accessed.
Workaround:
Written in front of the text: After using Bitlocker encryption, you must have one of the passwords or keys to open or restore the relevant files from the perspective of the user's information security. If you forget your password, you must find the backup key to open the file. If the key is not found, the encrypted file will basically not be opened...
If you have a key, you can use the administrator command to unlock the drive. The details are as follows:
In the Start menu, open “All Programs>Accessories> Command Prompt”. Right-click on the "Command Prompt" and select "Run as administrator" ”.

If a User Account Control (UAC) window pops up, please allow to continue.

Type the following command on the command line:
manage-bde –unlock E: -RecoveryPassword ******
Note: “******” BitLocker's recovery key is not the password we set ourselves (as shown in the yellow area below); in addition, please pay attention to the space.


unlock success:

reminder: after BitLocker encryption lifted, the password window does not pop up again in the future in order to avoid a good idea to unlock the drive, and then re-set it again BitLocker encryption .