Point to WMI exporter
There's a slow trickle of people trying to use the node exporter on windows, so point them in the right direction.
[![Docker Repository on Quay](https://quay.io/repository/prometheus/node-exporter/status)][quay]
[![Docker Pulls](https://img.shields.io/docker/pulls/prom/node-exporter.svg?maxAge=604800)][hub]
-Prometheus exporter for hardware and OS metrics exposed by the kernel, written
+Prometheus exporter for hardware and OS metrics exposed by \*NIX kernels, written
in Go with pluggable metric collectors.
+The [WMI exporter](https://github.com/martinlindhe/wmi_exporter) is recommended for Windows users.
+
## Collectors
There is varying support for collectors on each operating system. The tables
