Error 0x800720B1

Value: -2147016527 | 0x800720B1 | 2147950769

What does it mean ?

ERROR_DS_CANT_MOD_SYSTEM_ONLY  
The attribute cannot be modified because it is owned by the system.
Value: 8369 | 0x20B1 | 0b0010000010110001

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

Other Errors for FACILITY_WIN32