To start, I should mention currently only Windows 7 Ultimate, Windows 8.1 Enterprise and Windows 10 Enterprise & Education offer NFS-Client.
To "install" or activate the NFS-Client simply press start and go to "Add or Remove Programs">>"Turn Windows Features on or Off"
Make sure to expand Services for NFS and tick both sub-directories.
To Mount NFS Share use something like this:
To Unmount NFS use something like this:
If you use this guide, you should definitely read this guide on Silent CMDs to automate and hide this process. I have MountNFS-Silent in my startup and UnmountNFS-Silent pinned to start-menu. Having Mount-NFS in startup will fail if outside LAN, but no harm really, doesn't affect boot time.
NFS-Client for Windows does not automatically follow Remote Symlinks, please read here to enable.