1)Install Virtual box on your computer, no matter which Operating system you are using (Windows NT 4.0, 2000, XP, Server 2003, Vista, Windows 7, Windows 8, Windows 10) or even Linux (2.4, 2.6, 3.x and 4.x) !
2)Then install Windows7 (which NF runs the best on it) and NavyField download from http://www.navyfield.com/Download/Game/Main.aspx
3) Switch off anti virus/firewall or exclude NF files from the scan
4) Set NF to run as Administrator!
5) Most important, make sure NF launcher and NF.exe is on DEP exception list.
Now you are ready !
If you insist to run NF on Windows10, you can try all these steps on this website