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Changing COM Port Number
Some serial devices need a specific COM port in
order to work. If your serial device works properly,
do not change this setting.
1. From Device Manager double click Ports
(COM & LPT), then double click the
High-Speed USB Serial Port port you
want to change.
2. Click Features tab.
3. Click the down arrow that is next to the
COM Port Number drop down box and
select a COM port that is not in use.
4. Click OK to save the changes.
5. Unplug the Serial Adapter from the USB
port, then re-plug the Serial Adapter into
the same USB port to enable the changes.