Error 0x8024D015

Value: -2145071083 | 0x8024D015 | 2149896213

What does it mean ?

WU_E_SETUP_NON_DEFERRABLE_REBOOT_PENDING   
Windows Update Agent is successfully updated, but a reboot is required to complete the setup.
Value: 53269 | 0xD015 | 0b1101000000010101

Where does it come from ?

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

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Other Errors for FACILITY_WINDOWSUPDATE