To install nfs on win10 pro: got to old fashioned control panel>programs & features>(on left) turn windows featueres on or off then check everything under services for nfs.
Then you will need to create a file called "exports" on the libreELEC machine, I think in /storage/.config, following nfs tuts available on line.
I am still trying to figure out where samba.conf is supposed to live in LE, I guess the same place as exports.
Samba works fine for me, you can't browse to directories, but you type \\192.168.x.xxx into the nav bar and Viola!