Error 0x8024AFFF

Value: -2145079297 | 0x8024AFFF | 2149887999

What does it mean ?

WU_E_AU_UNEXPECTED  
There was an Automatic Updates error not covered by another WU_E_AU * code.
Value: 45055 | 0xAFFF | 0b1010111111111111

Where does it come from ?

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

Other Errors for FACILITY_WINDOWSUPDATE