When I installed it I got a green border around the application window, but when I try to run it after it has been installed by right-clicking and choosing Sandbox nothing happens. If I just double-click “Steam.exe” it starts normally without the green border. I suppose just having a program installed under the “VTRoot” folders doesn’t mean it will automatically be sandboxed. So maybe this was a bad idea. Has anyone else tried this?
Just out of curiosity why do you want to sandbox steam? I can see this causing many problems with games.