Error 0x80243FFF

Value: -2145107969 | 0x80243FFF | 2149859327

What does it mean ?

WU_E_AUCLIENT_UNEXPECTED  
There was a user interface error not covered by another WU_E_AUCLIENT_* error code.
Value: 16383 | 0x3FFF | 0b0011111111111111

Where does it come from ?

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

Other Errors for FACILITY_WINDOWSUPDATE