Error 0x80240009

Value: -2145124343 | 0x80240009 | 2149842953

What does it mean ?

WU_E_OPERATIONINPROGRESS  
A conflicting operation was in progress. Some operations (such as installation) cannot be performed simultaneously.
Value: 9 | 0x0009 | 0b0000000000001001

Where does it come from ?

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

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