Fix BitLocker Authentication Failed with TPM Not Working - Fix 'Task Scheduler Port Already Allocated Permission Denied'-How to Access a BitLocker-Locked External Drive That Won't Open

Updated 2026-06-14 03:04:55developer-tools
Fix BitLocker Authentication Failed with TPM Not Working - Fix 'Task Scheduler Port Already Allocated Permission Denied'-How to Access a BitLocker-Locked External Drive That Won't Open
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.