cd C:\boxofstops
java -jar boxofstops.jar
(where C:\boxofstops is the directory you copied <tt>portmidi.dll</tt> and <tt>boxofstops.jar</tt> toin the [[#Setting up|previous step]]).
When you first launch Box Of Stops on Windows, you may get a prompt from Windows Firewall. Naturally, you will need to ask it to unblock network connections, to allow Box Of Stops to receive a connection from a web browser: