Error 0x80242021

Value: -2145116127 | 0x80242021 | 2149851169

What does it mean ?

WU_E_UH_APPX_DEFAULT_PACKAGE_VOLUME_UNAVAILABLE  
The configured default storage volume is unavailable.
Value: 8225 | 0x2021 | 0b0010000000100001

Where does it come from ?

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

Other Errors for FACILITY_WINDOWSUPDATE