WU_E_PT_HTTP_STATUS_BAD_GATEWAY

Code: 0x80244021 (2149859361)

As HRESULT:

S: 1 (Failure)
C: 0 (Microsoft-defined)
N: 0 (Not an NTSTATUS value)
Facility: 0x024 (FACILITY_WINDOWSUPDATE: Windows update)
Code: 0x4021 (16417)

As NTSTATUS:

Sev: 2 (STATUS_SEVERITY_WARNING)
C: 0 (Microsoft-defined)
Facility: 0x024 (Unknown facility)
Code: 0x4021 (16417)

Abstract

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.

Documented in Win32

WUA Networking Error Codes (wuerror.h): 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.