This procedure assumes that your scanner was working with the Windows 7 driver created with the help of Windows Sevenforum (Getting your Nikon Coolscan to work on W7 x64 - Windows 7 Help Forums) and...

I have managed to get my Nikon Coolscan LS-40 working on Windows 10 using the Windows 7 driver solution :chuckle:. Did you ever reach a positive solution? If not I'll post the procedure.