Update troubleshooting.md

Author: Alex Finnarn

extra/troubleshooting.md

@@ -13,8 +13,13 @@ Docker Toolbox is not supported anymore by API Platform. Please upgrade to [Dock
 If the `app` container cannot start and display this `Error starting userland proxy: Bind for 0.0.0.0:80`, it means that port 80 is already in use. You can check to see which processes are currently listening on certain ports.
 
 ```bash
-# Mac OS: Find out if any service listens on port 80.
+# Find out if any service listens on port 80.
+# You can use this command on UNIX-based OSes like MacOS and Linux.
 sudo lsof -n -i :80 | grep LISTEN
+
+# For Windows, you can use netstat. 
+# This will give you all TCP/IP network connections and not just processes listening to port 80.
+netstat -a -b
 ```
 
 You can change the port to be used in the `docker-compose.yml` file (default is port 80).