In this post, you’ll learn about the error “ERROR_VHD_FORMAT_UNKNOWN 0xC03A0004” that is returned when working with COM based APIs or libraries in Windows.
COM Error Message
ERROR_VHD_FORMAT_UNKNOWN 0xC03A0004
What is COM?
Microsoft’s COM stands for Component Object Model. Component Object Model (COM) is a networked, object-oriented framework for building interoperable binary software components. Microsoft’s OLE (compound documents), ActiveX (Internet-enabled components), and other products are built on the COM base technology.
Error Description
Below is the description of this COM Error.
The system does not recognize the file format of this virtual hard disk.
