Error 0x80240051

Value: -2145124271 | 0x80240051 | 2149843025

What does it mean ?

WU_E_IDLESHUTDOWN_OPCOUNT_DOWNLOAD   
A download call contributed to a non-zero operation count at idle timer shutdown.
Value: 81 | 0x0051 | 0b0000000001010001

Where does it come from ?

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

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