In this post, you’ll learn more about the Error Code 0xC00D28AB – NS_E_DRM_DEVICE_ALREADY_REGISTERED that is returned when working with the Win32 Windows Media Format 11 SDK
Win32 Windows Media Format 11 SDK Error
0xC00D28AB – NS_E_DRM_DEVICE_ALREADY_REGISTERED
Win32 Windows Media Format 11 SDK Description
Device registration failed because the device is already registered.