The Windows Update Agent (WUA) API can return the following error codes when performing network operations such as searching for updates:

WU_E_PT_WINHTTP_NAME_NOT_RESOLVED

0x8024402C

Same as ERROR_WINHTTP_NAME_NOT_RESOLVED - The proxy server or target server name cannot be resolved.

WU_E_PT_HTTP_STATUS_BAD_REQUEST

0x80244016

Same as HTTP status 400 – The server could not process the request due to invalid syntax.

WU_E_PT_HTTP_STATUS_DENIED

0x80244017

Same as HTTP status 401 – The requested resource requires user authentication.

WU_E_PT_HTTP_STATUS_FORBIDDEN

0x80244018

Same as HTTP status 403 – Server understood the request, but declines to fulfill it.

WU_E_PT_HTTP_STATUS_NOT_FOUND

0x80244019

Same as HTTP status 404 – The server cannot find the requested URI (Uniform Resource Identifier).

WU_E_PT_HTTP_STATUS_BAD_METHOD

0x8024401A

Same as HTTP status 405 – The HTTP method is not allowed.

WU_E_PT_HTTP_STATUS_PROXY_AUTH_REQ

0x8024401B

Same as HTTP status 407 – Proxy authentication is required.

WU_E_PT_HTTP_STATUS_REQUEST_TIMEOUT

0x8024401C

Same as HTTP status 408 – The server timed out waiting for the request.

WU_E_PT_HTTP_STATUS_CONFLICT

0x8024401D

Same as HTTP status 409 – The request was not completed due to a conflict with the current state of the resource.

WU_E_PT_HTTP_STATUS_GONE

0x8024401E

Same as HTTP status 410 – Requested resource is no longer available at the server.

WU_E_PT_HTTP_STATUS_SERVER_ERROR

0x8024401F

Same as HTTP status 500 – An error internal to the server prevented fulfilling the request.

WU_E_PT_HTTP_STATUS_NOT_SUPPORTED

0x80244020

Same as HTTP status 501 – Server does not support the functionality required to fulfill the request.

WU_E_PT_HTTP_STATUS_BAD_GATEWAY

0x80244021

Same as HTTP status 502 – The server, while acting as a gateway or proxy, received an invalid response from the upstream server it accessed in attempting to fulfill the request.

WU_E_PT_HTTP_STATUS_SERVICE_UNAVAIL

0x80244022

Same as HTTP status 503 – The service is temporarily overloaded.

WU_E_PT_HTTP_STATUS_GATEWAY_TIMEOUT

0x80244023

Same as HTTP status 504 – The request was timed out waiting for a gateway.

WU_E_PT_HTTP_STATUS_VERSION_NOT_SUP

0x80244024

Same as HTTP status 505 – The server does not support the HTTP protocol version used for the request.

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Build date: 3/9/2009