Fix BitLocker 404 Error When Unlocking a Drive - Troubleshoot Windows Defender Can't Scan Folder Due to Permissions-WireGuard Handshake Failure: Configuration Check Guide

Updated 2026-06-14 03:28:51security-tools
Fix BitLocker 404 Error When Unlocking a Drive - Troubleshoot Windows Defender Can't Scan Folder Due to Permissions-WireGuard Handshake Failure: Configuration Check Guide
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.