Error 0x80240020

Value: -2145124320 | 0x80240020 | 2149842976

What does it mean ?

WU_E_NO_INTERACTIVE_USER  
Operation did not complete because there is no logged-on interactive user.
Value: 32 | 0x0020 | 0b0000000000100000

Where does it come from ?

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

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