Recently, I booted up Windows 11 (though I’ve also experienced this on Windows 10) and noticed that the WireGuard client app was missing from my system tray. When I tried to manually start WireGuard, I was greeted with the following error: “Manager already installed and running”.
Not a terribly helpful error and I wasn’t able to find much on it with a quick Google search so I thought I would share how I quickly fixed it in case anyone else comes across this.
The fix is rather simple- if Windows gives such an error, it obviously thinks that WireGuard is running, right?
So, all we have to do is kill the service in Windows by hitting Ctrl + Alt + Delete, finding the WireGuard Manager service, and then right clicking to stop the service:
Unfortunately, I haven’t been able to identify the root cause of this error. It’s only happened to me twice and I was able to resolve it with these steps.
Hope this helps someone else.