In this post, you’ll learn more about the Error ERROR_GRAPHICS_OPM_ALL_HDCP_HARDWARE_ALREADY_IN_USE – 0xC0262518 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
ERROR_GRAPHICS_OPM_ALL_HDCP_HARDWARE_ALREADY_IN_USE – 0xC0262518
Win32 COM Error Error Description
The IOPMVideoOutput::Configure method cannot enable HDCP because the display adapter’s HDCP hardware is already being used by other physical outputs.