Nikon Capture NX2 in Windows 10, it works!
I am using Windows 10 on a separate system since January while participating in the "Windows insider program".
Latest version is a marvel and works great.
While testing Win 10 I installed a fresh Capture NX2.6 version, and it works just like it did under Win 7 and Win 8.1.
Why Capture NX2.6 and not the latest 2.7? Because of RAW2NEF which enables to continue to use Nikon Capture NX2 for D810, D750 , D7200 and D5500 NEF files.
related topic: D810 and D750 nef files in Nikon Capture NX2.4.6, it works!
related topic: Why I prefer Capture NX2 over ACR for NEF conversion