ERROR_WINHTTP_SECURE_INVALID_CA

Indicates that a certificate chain was processed, but terminated in a root certificate that is not trusted by the trust provider (equivalent to **CERT_E_UNTRUSTEDROOT**).

Matched as: the code as given (hex)

Other names

• ERROR_INTERNET_INVALID_CA: The function is unfamiliar with the Certificate Authority that generated the server's certificate.

Source: WinHTTP Error Messages · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09