Hello,
Thank you for posting in Microsoft Community forum.
Based on the description, I understand your question is related to bitlocker.
Restart the computer, press and hold the F8 key as your computer restarts. The machine will show advanced boot options.
Select Repair your computer/Troubleshoot, and then open the Command Prompt.
Try run below command to check Bitlocker status on your machine:
manage-bde -status
You can also check the status of a specific drive, such as C drive:
manage-bde -status C:
If there is Bitlocker enabled drive, use below command to disable bitlocker of that drive:
Replace with your 48-digit recovery key, replace C with your current problem drive letter:
manage-bde -unlock C: -recoverypassword
After unlock, disable bitlocker use this command, replace C with your current drive letter:
manage-bde -off C:
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Have a nice day.
Best Regards,
Molly