This is not at all. WIN7 is different from XP. WIN7 is an option that you can only see the port in the device manager when you plug in something. For example, if you plug in a USB to serial cable and install a driver, you can see the port and get the port number.

Device Manager Device Manager is a management tool that can be used to manage devices on a computer. You can use Device Manager to view and change device properties, update device drivers, configure device settings, and uninstall devices.