It is possible that you can search for this subject very much and cannot find detailed info. Here is the ways you can do this;
- Use way : my computer > properties > hardware
- Click “Add new hardware”.
- Select “I have already connected the hardware.”
- Click “Add a new hardware device”.
- Click “Install hardware I manually select.”
- Select “Ports (COM and LPT)”
- Click “Next”
- Click “Communications Port”
- This way you are adding an additional COM port.