That's what they say in their support literature, and I've received emails about this issue from customers citing Nikon disclaiming support for user-created systems. If you built your own a Windows-based PC from scratch and installed the OS from a retail or OEM software package, Nikon may therefore decline to help you troubleshoot a problem with their software. This is just another reason why I don't recommend Nikon Capture NX-D any more. Nikon's updating and support practices are bottom of the pack.