As you may know, Steam doesn't like no-admin accounts for installing games or whatsoever. In my case, I have a user in my computer that usually install a lot of games and every time I have to put my password to successfully play them. Blame, /bin/SteamService.exe.

I came up with a solution: using RunAs to make Steam run as the admin user. But that is a potential security risk. So instead of that, I'm asking if is possible to do the following:

Hot to run SteamService.exe with high trust levels (or admin privileges) automatically when Steam calls it?

That way he can play and install games in Steam leaving the rest of the system alone. I don't mind if the user has to click "yes or no", but without prompt its better because some games asks every time they're executed.