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Changing Serial Port Number
Some serial port devices need a specific
communication port in order to function properly.
If your communication port device works, do not
make any changes.
1. Right click My Computer, click Manage,
then click Device Manager.
2. Double click Ports (COM & LPT), and
double click the PCI Express UART Port.
3. Click the Settings tab.
4. Click the down arrow next to the COM Port
Number to Use box. Select a communication
port that is not in use, then click OK.
5. Restart your system to take effect.