Trying to start a newly created cluster in PostgreSQL on Windows

I just created a new cluster using PostgreSQL 8.3 and looks like everything worked. What I am having issues with is trying to start the server of this new cluster. My two clusters are on different ports. When looking online to start the new cluster, I tried executing the following line: postgres -D C:\my\new\cluster\data\directory This is the error I get: > The server must be started under an unprivileged user ID to prevent > possible system security compromises. See the documentation for more > information on how to properly start the server. So I know I am running the command from administrator but I don't know how to run it from an "unprivileged user ID". Any help would be great!