In this post, you’ll learn about the error “ERROR_FLT_DISALLOW_FAST_IO 0x801F0004” that is returned when working with COM based APIs or libraries in Windows.
COM Error Message
ERROR_FLT_DISALLOW_FAST_IO 0x801F0004
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.
Disallow the Fast IO path for this operation.