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Fix Windows Update Login Loop with Account Sync Issues - How to Fix Windows Defender 504 Gateway Timeout-Remote Desktop Error 0x4: Cache Cleanup Guide

Updated 2026-06-14 13:37:44developer-tools
Fix Windows Update Login Loop with Account Sync Issues - How to Fix Windows Defender 504 Gateway Timeout-Remote Desktop Error 0x4: Cache Cleanup Guide
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.