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(6) After the driver program has been deleted, display Status：System clean completed, and Clean
System button is grey. Click "Exit" to quit uninstallation interface.
(The above is the installation process under windows XP operating system. The
installation process under windows 98/2000/vista operating system, etc. is similar to that
under windows XP operating system.)
VIII. Modification of Serial Port Number
Sometimes, virtual serial port that the computer automatically allocates does not match with
actually used serial port number, and here the serial port number may be modified to meet the
demand.
(1) Right-click "USB Serial Port （COM3）" in device manager, and select "Attribute"
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