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Fix Windows Update Error 0x80070020: Port Already Allocated - Resolve Windows Update 404 Error in Windows 10-Fix Windows Defender File Locked Error

2026-06-13 13:45:42
Fix Windows Update Error 0x80070020: Port Already Allocated - Resolve Windows Update 404 Error in Windows 10-Fix Windows Defender File Locked Error

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

Next references

Fix 7-Zip 'Unsupported Archive Format' ErrorFix Windows Update Cleanup Permission Denied ErrorFix Windows Defender 502 Bad Gateway Sync ErrorHow to Clear Windows Defender Cache with a ToolMaven Dependency Resolution Fails in CI Pipeline: How to FixFix Error 0x80070422 Windows Security Version Mismatch