Help with Pserver!

I have been getting 1 error on KrazyServer (0.6) HttpListenerException (ERR6) one of the ports used by the server is in use Please close any applications that run on these ports:2050,8080,8888. The problem is i dont know how exactly to do so.

Make sure you've done the following:
-Run as admin
-Don't have mySQL running
-Updated .NET Framework

PM me if it doesn't work after that