Hmm, I know it works on NUCs. I have a ROCK in the cellar that I use as an endpoint.
Must be the ‘tinkered’ solution of running on the Lenovo.
Of course, for short outages, whatever that turns out to be, you could run off a UPS.
BTW - Years ago, when I ran Core under Windows, I asked for a similar solution, i.e. to be able to shut down/restart gracefully using the Roon Remote. That request went down the rat hole, so I feel your pain. 
I understand it’s not ideal, and not perfect.
But my database has never corrupted from a power outage, or hard reboot. But I understand there is a risk, and this is not best practise.
In the absence of a good idea from myself, can you suggest an alternate method, that doesn’t require a second PC to send commands. I.e for example, are you aware of a remote wake on Lan app for IOS?
If this type of functionality is required, a Linux distribution like Ubuntu or similar might be better suited, allowing app install and customisation.
Nucleus runs ROCK. But database corruption - and other problems - could happen on any OS if power is lost, so it is relevant.
Someone suggested to me a small Windows computer and Splashtop for rebooting my Nucleus. Sounds like a reasonable idea. If I was going to do this, I would also like it to work as a Roon control device to open my Nucleus and reconnect to Tidal and Qobuz if necessary. I’m not sure a simple reboot always does that.
Here’s the solution , make ARC stable that it doesn’t hang the core in any way. This is the main problem. Why fit a square plug in a round hole. This is Roons problem to fix rather than keep adding on new features. PlexAmp has never once hung my Plex server.
If Roon Server is locked up, how would this work? You can’t ask Roon to restart itself if it’s not responding in the first place.
Better to fix whatever is causing Roon to become unresponsive.
I solved this by purchasing a used Mac Mini for $200 and installing Roon client. I’m using Splashtop on my Dell laptop to control the Mac Mini. It works very well so far and can control my Nucleus from anywhere.
Another unplanned benefit of the Mac Mini…it’s connected by ethernet with HDMI to Bose via LG.
EDIT: I moved the Mac Mini back to our master bedroom because I’m running out of HDMI ports and wanted to plug the Apple TV 4K back in. I guess I could run the Mac Mini with HDMI through the Oppo 203 if I really needed it.
Just use something like this: TP-Link Tapo Smart Wi-Fi Socket Tapo P110 or P100. You will be able to “reboot” your system. BTW: @David_Snyder is absolutely right: …how could Roon reboot (respectively answer to a reboot request) when the kernel is “crashed”
I run Roon core on a Mac mini, and have scheduled it to restart itself every morning ca.3am … this seem to keep it purring along much better, I do also clear some local data as there is (or maybe was) a memory leak that kept eating up memory and eventually kill the mini.
Other benefit was that dynamic playlists updated at the same time.
See if you can schedule a restart on your windows machine.
In case somebody on Mac wants to know how:
TeamViewer would be a pro-product (free of charge for private use) to control Windows and MacOS machines (even mobiles to some degree).
I have fooled with TeamViewer in the past and could never get it to work. I’ll take a look at it a year from now.
I used to use TeamViewer and then switched to Splashtop. At just over a dollar a month, compared to Roon and the other subs, it is just not worth the time to switch if you have got something working.
Here’s a way to do it with unlimited Verizon cellphone data. This is my Roon Nucleus and Mac Mini running Roon client at home with Splashtop on my iPhone 13 Pro Max, still at the MIL’s house. My iPhone is the only device I have with truly unlimited, non-throttled cellular data. Of course, Roon ARC does basically the same thing, but at higher resolution.
Like others for Arc, I use wireguard vpn tunnel to connect to a pi running pi vpn.
When wireguard tunnel is connected you can access everything on the LAN including ROCK via its local IP.
Not much use if theres been a power failure, but ok for restarts.
Apropos of nothing, (though I agree a proper solution is required with ARC) here is how I do it at the moment.
My Synology NAS allows a remote connection to its management interface via a web browser. This is simple to setup, but obviously presupposes you have a NAS!
I create a scheduled task in the NAS UI that just performs a GET connection to the reboot URL for ROCK. The script looks like this;
#!/bin/bash
wget -nd --delete-after http://rock.local/1/reboot
When away from home I login to the NAS UI remotely from my phone and run the scheduled task to restart ROCK.
