Fix Windows Defender Not Starting Due to Antivirus Conflict - Fix Windows Search Not Indexing External Drives-BitLocker 502 Bad Gateway Troubleshooting Guide

Updated 2026-06-19 03:54:05security-tools
Fix Windows Defender Not Starting Due to Antivirus Conflict - Fix Windows Search Not Indexing External Drives-BitLocker 502 Bad Gateway Troubleshooting 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.