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Fix Windows Update 504 Gateway Timeout Error - How to Fix ERR_TUNNEL_CONNECTION_FAILED in Chrome on Windows 10-How to Fix RDP Screen Freeze After Windows Update

Updated 2026-06-14 12:30:10developer-tools
Fix Windows Update 504 Gateway Timeout Error - How to Fix ERR_TUNNEL_CONNECTION_FAILED in Chrome on Windows 10-How to Fix RDP Screen Freeze After Windows Update
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.