Error 0x8004A020

Value: -2147180512 | 0x8004A020 | 2147786784

What does it mean ?

Indicates that the INetCfgComponent interface is not expected to be initialized, but it is already initialized. For example, this code is returned if the INetCfgComponent interface is already initialized before the INetCfg::Initialize method has been called.
Value: 40992 | 0xA020 | 0b1010000000100000
A required element is missing.
Value: 40992 | 0xA020 | 0b1010000000100000

Where does it come from ?

COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

Other Errors for FACILITY_ITF