Merge pull request #12 from arduino/HC-939_Windows-defender-blocks-mdns

HC-939 Windows defender blocks mdns

Author: seaxwi

content/Software and Downloads/IDE Settings/About-mdns-discovery-exe.md

@@ -0,0 +1,9 @@
+---
+title: "About mdns-discovery.exe"
+---
+
+Arduino IDE includes an [mDNS discovery tool](https://github.com/arduino/mdns-discovery) to find available network ports. Arduino IDE automatically updates this tool whenever a new version becomes available but Windows Firewall will not automatically permit the new version to communicate on the network. When a new version has been installed you will receive an alert and asked to allow access.
+
+## Further reading
+
+* [Release history for mdns-discovery](https://github.com/arduino/mdns-discovery/releases).