Error 0x8024EFFF

Value: -2145062913 | 0x8024EFFF | 2149904383

What does it mean ?

WU_E_EE_UNEXPECTED  
There was an expression evaluator error not covered by another WU_E_EE_* error code.
Value: 61439 | 0xEFFF | 0b1110111111111111

Where does it come from ?

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

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