My external HDD is locked by Bitlocker on the laptop with Windows 7. The error message is: "Error recovering disk : A recovery key was not found on this drive. The drive can not be unlocked." I have never used Bitlocker to lock my HDD. I have got neither key nor password. On the other laptop with Windows 10 the external HDD works well without any error. Could you please help me with this problem? What should I do to open my external HDD on the laptop with Windows 7?