Simple question....Is there a way to monitor a Window's computer and display its status (similar to mobile app)? I would like to display if a computer is on or off...and possibly more.
Hass agent will do some of that.
Easy way to monitor if your PC in on/off is just to use ping integration.
Easy way to turn off or sleep your PC is to install this for example in a client:
and use HTTP GET request from HA to do that.
Hass.agent without MQTT is pretty limited with these things but If you setup hass.agent + MQTT you can pretty much monitor and do remotely what ever you want (CPU and RAM usage, temperatures, start or monitor if processes are active, what window is active at the moment just to name a few).