Windows access permissions preventing ui start-up

[IrregularShed]

After a while not doing anything with Mongoose OS, an upcoming project saw a need to evaluate its suitability. However, something has changed in Windows in the 11 months that have passed - it might be the standard MS updates, or upgrading to Win10 Pro to run Docker, I'm not certain.

When I try and launch mos.exe for the UI, regardless of whether I'm in a standard or administrator shell, I'm getting this error:

C:\mos>mos.exe
Error: listen tcp 127.0.0.1:1992: bind: An attempt was made to access a socket in a way forbidden by its access permissions.
/go/src/cesanta.com/mos/ui.go:332:
/go/src/cesanta.com/mos/main.go:176: ui failed

mos.exe version reports that I'm using v2.10.2, but I had the same error when I tried to run the older version I had, from February 2018.

Is there anything I can do to get around this?

[rojer]

firewall or antivirus settings of some sort? windows is weird.

[rojer]

i can say that it works fine on vanilla windows 10 with windows defender. you may have some other software that prevents it from opening a listening socket.

[IrregularShed]

I've got stock Windows Defender and Windows Firewall. Windows version is 1809. There's nothing on port 1992 at all and mos.exe has all the permissions set in the firewall config.

I couldn't see if there was a way to pass an alternative port through from the command line - thinking about it now I had an issue with Loopback trying to bind to port 3000 which I hadn't seen before, and I thought that might be a way of tracking down the cause of this.

[Panometric]

The port 1992 is being reserved by Hyper-V which is also used by docker desktop. See: https://github.com/googlevr/gvr-unity-sdk/issues/1002