Error 0x80244023

Value: -2145107933 | 0x80244023 | 2149859363

What does it mean ?

WU_E_PT_HTTP_STATUS_GATEWAY_TIMEOUT  
HTTP 504 - the request was timed out waiting for a gateway.
Value: 16419 | 0x4023 | 0b0100000000100011

Where does it come from ?

FACILITY_WINDOWSUPDATE  
Windows update
Value: 36 | 0x024 | 0b00100100

Other Errors for FACILITY_WINDOWSUPDATE