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WU_E_PT_ADDRESS_NOT_AVAILABLE
WU_E_PT_ADDRESS_NOT_AVAILABLE indicates that the Windows Web Services layer could not use an address in the current context. A changed network interface, disconnected VPN, or stale binding can produce this kind of failure.
What to check
- Confirm that the intended network interface and route are present when the scan runs.
- Compare the failure time with VPN reconnects, DHCP changes, sleep/resume, or network-policy changes.
- Retry after network stability is restored and use the earlier transport log entries to identify the affected endpoint.
Microsoft: WUA networking error codes
Microsoft: Windows Update troubleshooting
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