Hi Atul,
Thank you for letting us know your concern.
I would suggest you to go through the below links and check if that helps:
http://windows.microsoft.com/en-us/windows-8/bitlocker-drive-encryption
You may also refer the answer given by DrewG.33 and check if that helps:
Additional Information:
https://technet.microsoft.com/en-us/library/hh831507.aspx
Keep us posted if you face any issues on windows in future. We will be glad to help you.