When I am working as a System Administrator, I am getting many chances to learn new things even though it is not a big issue or serious problem in organization. So I also thought to share you this solution which might work or you may need in upcoming future in any time.
Whenever I boot my computer, it always ask for the Bit locker key.
You can also disable your bit locker encryption, but that is not a solution. So once you enter into your computer with bit locker key, then open command prompt in administrator mode and type following command:
manage-bde –protectors –delete C: -type TPM
manage-bde –protectors –add C: -tpm
And then boot again your PC, it will work like a charm.