If you cannot enter the recovery key to unlock it, another way is doing the re-installation Operating System process. Therefore, you need to provide a recovery key to solve this problem, please refer to the following troubleshooting steps. (HDD/SDD is locked.) Once PC hardware components have been replaced or BIOS settings have been changed, all may cause system shows BitLocker recovery screen after power on. If you experiences that the computer shows BitLocker recovery screen after power on, it means that the HDD/SDD has been encrypted. Troubleshooting - How to fix it shows BitLocker recovery screen after power on/Find BitLocker recovery key