Hello, Welcome to Microsoft Community.
Thanks for your feedback, Based on my understanding, you want to turn off the BitLocker feature on your computer.
Since you have the BitLocker recovery key, you can try the following steps to disable BitLocker:
- Press the windows+X key, and choose Windows PowerShell (Administrator).
- Once opened, type the following command in the command window:
manage-bde -unlock YourDriveLetter: -Password
The system will prompt you to enter your user password.
Simply input the password directly. It won't be visible as you type. Once done, press Enter.
- Next, turn off BitLocker encryption:
manage-bde -off YourDriveLetter:
Wait for the process to complete, and your drive will be unlocked.
Below are some screenshots for your reference.
This operation will take some time, so please do it when you're free. It's best not to restart your computer until it's done.
Looking forward to getting your issue resolved.
Lugoo Bei | Microsoft Community Support Specialist