What does HRESULT 0x80244021 (WU_E_PT_HTTP_STATUS_BAD_GATEWAY) mean?

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Description:

A gateway or proxy returned HTTP 502 while Windows Update was contacting an upstream service.

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WU_E_PT_HTTP_STATUS_BAD_GATEWAY

WU_E_PT_HTTP_STATUS_BAD_GATEWAY maps to HTTP 502: a gateway or proxy received an invalid response from the upstream server. The failure is usually between the intermediary and its upstream service, not in the update package.

What to check

Identify the proxy or gateway that generated the 502 from its logs or response headers.
Verify upstream WSUS or Windows Update service reachability from that intermediary.
Check current proxy configuration on the client, especially in managed networks where WinHTTP is used.

Microsoft: WUA networking error codes

Microsoft: Windows Update proxy troubleshooting

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