Q: WiFi freezing

Hello,

I've macOS Sierra running on Mac-mini ( late 2012). I came across this strange problem this morning. The server has had ethernet connection active  and Wi-Fi always been off. All of a sudden, the Wi-Fi was turned on and it won't let me turn it off. It is just freezing.  The command line won't work either.

Has anyone seen this before and know how to fix it?

Thanks