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Fix PowerShell Authentication Failed Credentials Error - Troubleshoot Windows Search Indexing Service Startup Failure-Fix Windows Defender 502 Bad Gateway Sync Error

2026-06-13 19:59:28browser-issues
Fix PowerShell Authentication Failed Credentials Error - Troubleshoot Windows Search Indexing Service Startup Failure-Fix Windows Defender 502 Bad Gateway Sync Error

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.