Error 0x8024004A

Value: -2145124278 | 0x8024004A | 2149843018

What does it mean ?

WU_E_SETUP_IN_PROGRESS  
Windows Update agent operations are not available while OS setup is running.
Value: 74 | 0x004A | 0b0000000001001010

Where does it come from ?

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

Other Errors for FACILITY_WINDOWSUPDATE