Delete Recovery key from microsoft servers
at 2016-08-07 03:20:00.
https://onedrive.live.com/recoverykey
Generate a New Recovery Key:
open cmd as admin
temporarily suspend bitlocker
manage-bde -protectors -disable %systemdrive%
elete the current recovery key:
manage-bde -protectors -delete %systemdrive% -type RecoveryPassword
generate a new recovery key:
manage-bde -protectors -add %systemdrive% -RecoveryPassword
Write down or print out the recovery key displayed after you run this command and keep it in a safe place!
re-enable the BitLocker protection:
manage-bde -protectors -enable %systemdrive%