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Fix PowerShell Invoke-WebRequest 404 Not Found Errors - Resolve Windows Defender Connection Refused in Windows 10-TLS Version Mismatch Causing 502 in PowerShell

Updated 2026-06-14 06:40:24developer-tools
Fix PowerShell Invoke-WebRequest 404 Not Found Errors - Resolve Windows Defender Connection Refused in Windows 10-TLS Version Mismatch Causing 502 in PowerShell
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.

More repair notes

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