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| WU_E_REDIRECTOR_UNKNOWN_SERVICE | WU_E_REDIRECTOR_INVALID_RESPONSE |
WU_E_REDIRECTOR_UNSUPPORTED_CONTENTTYPE
WU_E_REDIRECTOR_UNSUPPORTED_CONTENTTYPE means the server response reached the client, but its MIME content type was not valid for the redirector request. A proxy or gateway returning an HTML login, block page, or diagnostic response is a common class of cause.
What to check
- Inspect proxy and server logs for the exact request and response headers.
- Check whether captive portals, authentication challenges, URL filtering, or TLS inspection changed the response.
- Verify the WinHTTP proxy configuration used by the system-level update client.
netsh winhttp show proxyMicrosoft: Windows Update proxy selection
Microsoft: Windows Update error reference
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