Error 0x802450FF

Value: -2145103617 | 0x802450FF | 2149863679

What does it mean ?

WU_E_REDIRECTOR_UNEXPECTED  
The redirector failed for reasons not covered by another WU_E_REDIRECTOR_* error code.
Value: 20735 | 0x50FF | 0b0101000011111111

Where does it come from ?

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

Other Errors for FACILITY_WINDOWSUPDATE